Add Knative metrics to Prometheus

20 files changed, 775 insertions, 129 deletions

diff --git a/spec/controllers/projects/serverless/functions_controller_spec.rb b/spec/controllers/projects/serverless/functions_controller_spec.rb
index 276cf340962..782f5f272d9 100644
--- a/spec/controllers/projects/serverless/functions_controller_spec.rb
+++ b/spec/controllers/projects/serverless/functions_controller_spec.rb
@@ -76,6 +76,15 @@ describe Projects::Serverless::FunctionsController do
     end
   end
 
+  describe 'GET #metrics' do
+    context 'invalid data' do
+      it 'has a bad function name' do
+        get :metrics, params: params({ format: :json, environment_id: "*", id: "foo" })
+        expect(response).to have_gitlab_http_status(204)
+      end
+    end
+  end
+
   describe 'GET #index with data', :use_clean_rails_memory_store_caching do
     before do
       stub_kubeclient_service_pods
diff --git a/spec/features/projects/serverless/functions_spec.rb b/spec/features/projects/serverless/functions_spec.rb
index aa71669de98..e14934b1672 100644
--- a/spec/features/projects/serverless/functions_spec.rb
+++ b/spec/features/projects/serverless/functions_spec.rb
@@ -50,7 +50,7 @@ describe 'Functions', :js do
     end
 
     it 'sees an empty listing of serverless functions' do
-      expect(page).to have_selector('.gl-responsive-table-row')
+      expect(page).to have_selector('.empty-state')
     end
   end
 end
diff --git a/spec/finders/projects/serverless/functions_finder_spec.rb b/spec/finders/projects/serverless/functions_finder_spec.rb
index 35279906854..3ad38207da4 100644
--- a/spec/finders/projects/serverless/functions_finder_spec.rb
+++ b/spec/finders/projects/serverless/functions_finder_spec.rb
@@ -4,6 +4,7 @@ require 'spec_helper'
 
 describe Projects::Serverless::FunctionsFinder do
   include KubernetesHelpers
+  include PrometheusHelpers
   include ReactiveCachingHelpers
 
   let(:user) { create(:user) }
@@ -24,12 +25,12 @@ describe Projects::Serverless::FunctionsFinder do
 
   describe 'retrieve data from knative' do
     it 'does not have knative installed' do
-      expect(described_class.new(project.clusters).execute).to be_empty
+      expect(described_class.new(project).execute).to be_empty
     end
 
     context 'has knative installed' do
       let!(:knative) { create(:clusters_applications_knative, :installed, cluster: cluster) }
-      let(:finder) { described_class.new(project.clusters) }
+      let(:finder) { described_class.new(project) }
 
       it 'there are no functions' do
         expect(finder.execute).to be_empty
@@ -58,13 +59,36 @@ describe Projects::Serverless::FunctionsFinder do
         expect(result).not_to be_empty
         expect(result["metadata"]["name"]).to be_eql(cluster.project.name)
       end
+
+      it 'has metrics', :use_clean_rails_memory_store_caching do
+      end
+    end
+
+    context 'has prometheus' do
+      let(:prometheus_adapter) { double('prometheus_adapter', can_query?: true) }
+      let!(:knative) { create(:clusters_applications_knative, :installed, cluster: cluster) }
+      let!(:prometheus) { create(:clusters_applications_prometheus, :installed, cluster: cluster) }
+      let(:finder) { described_class.new(project) }
+
+      before do
+        allow(finder).to receive(:prometheus_adapter).and_return(prometheus_adapter)
+        allow(prometheus_adapter).to receive(:query).and_return(prometheus_empty_body('matrix'))
+      end
+
+      it 'is available' do
+        expect(finder.has_prometheus?("*")).to be true
+      end
+
+      it 'has query data' do
+        expect(finder.invocation_metrics("*", cluster.project.name)).not_to be_nil
+      end
     end
   end
 
   describe 'verify if knative is installed' do
     context 'knative is not installed' do
       it 'does not have knative installed' do
-        expect(described_class.new(project.clusters).installed?).to be false
+        expect(described_class.new(project).installed?).to be false
       end
     end
 
@@ -72,7 +96,7 @@ describe Projects::Serverless::FunctionsFinder do
       let!(:knative) { create(:clusters_applications_knative, :installed, cluster: cluster) }
 
       it 'does have knative installed' do
-        expect(described_class.new(project.clusters).installed?).to be true
+        expect(described_class.new(project).installed?).to be true
       end
     end
   end
diff --git a/spec/javascripts/serverless/components/area_spec.js b/spec/javascripts/serverless/components/area_spec.js
new file mode 100644
index 00000000000..2be6ac3d268
--- /dev/null
+++ b/spec/javascripts/serverless/components/area_spec.js
@@ -0,0 +1,121 @@
+import { shallowMount } from '@vue/test-utils';
+import Area from '~/serverless/components/area.vue';
+import { mockNormalizedMetrics } from '../mock_data';
+
+describe('Area component', () => {
+  const mockWidgets = 'mockWidgets';
+  const mockGraphData = mockNormalizedMetrics;
+  let areaChart;
+
+  beforeEach(() => {
+    areaChart = shallowMount(Area, {
+      propsData: {
+        graphData: mockGraphData,
+        containerWidth: 0,
+      },
+      slots: {
+        default: mockWidgets,
+      },
+    });
+  });
+
+  afterEach(() => {
+    areaChart.destroy();
+  });
+
+  it('renders chart title', () => {
+    expect(areaChart.find({ ref: 'graphTitle' }).text()).toBe(mockGraphData.title);
+  });
+
+  it('contains graph widgets from slot', () => {
+    expect(areaChart.find({ ref: 'graphWidgets' }).text()).toBe(mockWidgets);
+  });
+
+  describe('methods', () => {
+    describe('formatTooltipText', () => {
+      const mockDate = mockNormalizedMetrics.queries[0].result[0].values[0].time;
+      const generateSeriesData = type => ({
+        seriesData: [
+          {
+            componentSubType: type,
+            value: [mockDate, 4],
+          },
+        ],
+        value: mockDate,
+      });
+
+      describe('series is of line type', () => {
+        beforeEach(() => {
+          areaChart.vm.formatTooltipText(generateSeriesData('line'));
+        });
+
+        it('formats tooltip title', () => {
+          expect(areaChart.vm.tooltipPopoverTitle).toBe('28 Feb 2019, 11:11AM');
+        });
+
+        it('formats tooltip content', () => {
+          expect(areaChart.vm.tooltipPopoverContent).toBe('Invocations (requests): 4');
+        });
+      });
+
+      it('verify default interval value of 1', () => {
+        expect(areaChart.vm.getInterval).toBe(1);
+      });
+    });
+
+    describe('onResize', () => {
+      const mockWidth = 233;
+
+      beforeEach(() => {
+        spyOn(Element.prototype, 'getBoundingClientRect').and.callFake(() => ({
+          width: mockWidth,
+        }));
+        areaChart.vm.onResize();
+      });
+
+      it('sets area chart width', () => {
+        expect(areaChart.vm.width).toBe(mockWidth);
+      });
+    });
+  });
+
+  describe('computed', () => {
+    describe('chartData', () => {
+      it('utilizes all data points', () => {
+        expect(Object.keys(areaChart.vm.chartData)).toEqual(['requests']);
+        expect(areaChart.vm.chartData.requests.length).toBe(2);
+      });
+
+      it('creates valid data', () => {
+        const data = areaChart.vm.chartData.requests;
+
+        expect(
+          data.filter(
+            datum => new Date(datum.time).getTime() > 0 && typeof datum.value === 'number',
+          ).length,
+        ).toBe(data.length);
+      });
+    });
+
+    describe('generateSeries', () => {
+      it('utilizes correct time data', () => {
+        expect(areaChart.vm.generateSeries.data).toEqual([
+          ['2019-02-28T11:11:38.756Z', 0],
+          ['2019-02-28T11:12:38.756Z', 0],
+        ]);
+      });
+    });
+
+    describe('xAxisLabel', () => {
+      it('constructs a label for the chart x-axis', () => {
+        expect(areaChart.vm.xAxisLabel).toBe('invocations / minute');
+      });
+    });
+
+    describe('yAxisLabel', () => {
+      it('constructs a label for the chart y-axis', () => {
+        expect(areaChart.vm.yAxisLabel).toBe('Invocations (requests)');
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/serverless/components/environment_row_spec.js b/spec/javascripts/serverless/components/environment_row_spec.js
index bdf7a714910..932d712dbec 100644
--- a/spec/javascripts/serverless/components/environment_row_spec.js
+++ b/spec/javascripts/serverless/components/environment_row_spec.js
@@ -1,81 +1,70 @@
-import Vue from 'vue';
-
 import environmentRowComponent from '~/serverless/components/environment_row.vue';
-import mountComponent from 'spec/helpers/vue_mount_component_helper';
-import ServerlessStore from '~/serverless/stores/serverless_store';
+import { createLocalVue, shallowMount } from '@vue/test-utils';
 
 import { mockServerlessFunctions, mockServerlessFunctionsDiffEnv } from '../mock_data';
+import { translate } from '~/serverless/utils';
 
-const createComponent = (env, envName) =>
-  mountComponent(Vue.extend(environmentRowComponent), { env, envName });
+const createComponent = (localVue, env, envName) =>
+  shallowMount(environmentRowComponent, { localVue, propsData: { env, envName } }).vm;
 
 describe('environment row component', () => {
   describe('default global cluster case', () => {
+    let localVue;
     let vm;
 
     beforeEach(() => {
-      const store = new ServerlessStore(false, '/cluster_path', 'help_path');
-      store.updateFunctionsFromServer(mockServerlessFunctions);
-      vm = createComponent(store.state.functions['*'], '*');
+      localVue = createLocalVue();
+      vm = createComponent(localVue, translate(mockServerlessFunctions)['*'], '*');
     });
 
+    afterEach(() => vm.$destroy());
+
     it('has the correct envId', () => {
       expect(vm.envId).toEqual('env-global');
-      vm.$destroy();
     });
 
     it('is open by default', () => {
       expect(vm.isOpenClass).toEqual({ 'is-open': true });
-      vm.$destroy();
     });
 
     it('generates correct output', () => {
-      expect(vm.$el.querySelectorAll('li').length).toEqual(2);
       expect(vm.$el.id).toEqual('env-global');
       expect(vm.$el.classList.contains('is-open')).toBe(true);
       expect(vm.$el.querySelector('div.title').innerHTML.trim()).toEqual('*');
-
-      vm.$destroy();
     });
 
     it('opens and closes correctly', () => {
       expect(vm.isOpen).toBe(true);
 
       vm.toggleOpen();
-      Vue.nextTick(() => {
-        expect(vm.isOpen).toBe(false);
-      });
 
-      vm.$destroy();
+      expect(vm.isOpen).toBe(false);
     });
   });
 
   describe('default named cluster case', () => {
     let vm;
+    let localVue;
 
     beforeEach(() => {
-      const store = new ServerlessStore(false, '/cluster_path', 'help_path');
-      store.updateFunctionsFromServer(mockServerlessFunctionsDiffEnv);
-      vm = createComponent(store.state.functions.test, 'test');
+      localVue = createLocalVue();
+      vm = createComponent(localVue, translate(mockServerlessFunctionsDiffEnv).test, 'test');
     });
 
+    afterEach(() => vm.$destroy());
+
     it('has the correct envId', () => {
       expect(vm.envId).toEqual('env-test');
-      vm.$destroy();
     });
 
     it('is open by default', () => {
       expect(vm.isOpenClass).toEqual({ 'is-open': true });
-      vm.$destroy();
     });
 
     it('generates correct output', () => {
-      expect(vm.$el.querySelectorAll('li').length).toEqual(1);
       expect(vm.$el.id).toEqual('env-test');
       expect(vm.$el.classList.contains('is-open')).toBe(true);
       expect(vm.$el.querySelector('div.title').innerHTML.trim()).toEqual('test');
-
-      vm.$destroy();
     });
   });
 });
diff --git a/spec/javascripts/serverless/components/function_details_spec.js b/spec/javascripts/serverless/components/function_details_spec.js
new file mode 100644
index 00000000000..a29d4a296ef
--- /dev/null
+++ b/spec/javascripts/serverless/components/function_details_spec.js
@@ -0,0 +1,113 @@
+import Vuex from 'vuex';
+
+import functionDetailsComponent from '~/serverless/components/function_details.vue';
+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { createStore } from '~/serverless/store';
+
+describe('functionDetailsComponent', () => {
+  let localVue;
+  let component;
+  let store;
+
+  beforeEach(() => {
+    localVue = createLocalVue();
+    localVue.use(Vuex);
+
+    store = createStore();
+  });
+
+  afterEach(() => {
+    component.vm.$destroy();
+  });
+
+  describe('Verify base functionality', () => {
+    const serviceStub = {
+      name: 'test',
+      description: 'a description',
+      environment: '*',
+      url: 'http://service.com/test',
+      namespace: 'test-ns',
+      podcount: 0,
+      metricsUrl: '/metrics',
+    };
+
+    it('has a name, description, URL, and no pods loaded', () => {
+      component = shallowMount(functionDetailsComponent, {
+        localVue,
+        store,
+        propsData: {
+          func: serviceStub,
+          hasPrometheus: false,
+          clustersPath: '/clusters',
+          helpPath: '/help',
+        },
+      });
+
+      expect(
+        component.vm.$el.querySelector('.serverless-function-name').innerHTML.trim(),
+      ).toContain('test');
+
+      expect(
+        component.vm.$el.querySelector('.serverless-function-description').innerHTML.trim(),
+      ).toContain('a description');
+
+      expect(component.vm.$el.querySelector('p').innerHTML.trim()).toContain(
+        'No pods loaded at this time.',
+      );
+    });
+
+    it('has a pods loaded', () => {
+      serviceStub.podcount = 1;
+
+      component = shallowMount(functionDetailsComponent, {
+        localVue,
+        store,
+        propsData: {
+          func: serviceStub,
+          hasPrometheus: false,
+          clustersPath: '/clusters',
+          helpPath: '/help',
+        },
+      });
+
+      expect(component.vm.$el.querySelector('p').innerHTML.trim()).toContain('1 pod in use');
+    });
+
+    it('has multiple pods loaded', () => {
+      serviceStub.podcount = 3;
+
+      component = shallowMount(functionDetailsComponent, {
+        localVue,
+        store,
+        propsData: {
+          func: serviceStub,
+          hasPrometheus: false,
+          clustersPath: '/clusters',
+          helpPath: '/help',
+        },
+      });
+
+      expect(component.vm.$el.querySelector('p').innerHTML.trim()).toContain('3 pods in use');
+    });
+
+    it('can support a missing description', () => {
+      serviceStub.description = null;
+
+      component = shallowMount(functionDetailsComponent, {
+        localVue,
+        store,
+        propsData: {
+          func: serviceStub,
+          hasPrometheus: false,
+          clustersPath: '/clusters',
+          helpPath: '/help',
+        },
+      });
+
+      expect(
+        component.vm.$el.querySelector('.serverless-function-description').querySelector('div')
+          .innerHTML.length,
+      ).toEqual(0);
+    });
+  });
+});
diff --git a/spec/javascripts/serverless/components/function_row_spec.js b/spec/javascripts/serverless/components/function_row_spec.js
index 6933a8f6c87..3987e1753bd 100644
--- a/spec/javascripts/serverless/components/function_row_spec.js
+++ b/spec/javascripts/serverless/components/function_row_spec.js
@@ -1,11 +1,9 @@
-import Vue from 'vue';
-
 import functionRowComponent from '~/serverless/components/function_row.vue';
-import mountComponent from 'spec/helpers/vue_mount_component_helper';
+import { shallowMount } from '@vue/test-utils';
 
 import { mockServerlessFunction } from '../mock_data';
 
-const createComponent = func => mountComponent(Vue.extend(functionRowComponent), { func });
+const createComponent = func => shallowMount(functionRowComponent, { propsData: { func } }).vm;
 
 describe('functionRowComponent', () => {
   it('Parses the function details correctly', () => {
@@ -13,10 +11,7 @@ describe('functionRowComponent', () => {
 
     expect(vm.$el.querySelector('b').innerHTML).toEqual(mockServerlessFunction.name);
     expect(vm.$el.querySelector('span').innerHTML).toEqual(mockServerlessFunction.image);
-    expect(vm.$el.querySelector('time').getAttribute('data-original-title')).not.toBe(null);
-    expect(vm.$el.querySelector('div.url-text-field').innerHTML).toEqual(
-      mockServerlessFunction.url,
-    );
+    expect(vm.$el.querySelector('timeago-stub').getAttribute('time')).not.toBe(null);
 
     vm.$destroy();
   });
@@ -25,8 +20,6 @@ describe('functionRowComponent', () => {
     const vm = createComponent(mockServerlessFunction);
 
     expect(vm.checkClass(vm.$el.querySelector('p'))).toBe(true); // check somewhere inside the row
-    expect(vm.checkClass(vm.$el.querySelector('svg'))).toBe(false); // check a button image
-    expect(vm.checkClass(vm.$el.querySelector('div.url-text-field'))).toBe(false); // check the url bar
 
     vm.$destroy();
   });
diff --git a/spec/javascripts/serverless/components/functions_spec.js b/spec/javascripts/serverless/components/functions_spec.js
index 85cfe71281f..c32978ea58a 100644
--- a/spec/javascripts/serverless/components/functions_spec.js
+++ b/spec/javascripts/serverless/components/functions_spec.js
@@ -1,68 +1,101 @@
-import Vue from 'vue';
+import Vuex from 'vuex';
 
 import functionsComponent from '~/serverless/components/functions.vue';
-import mountComponent from 'spec/helpers/vue_mount_component_helper';
-import ServerlessStore from '~/serverless/stores/serverless_store';
-
+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { createStore } from '~/serverless/store';
 import { mockServerlessFunctions } from '../mock_data';
 
-const createComponent = (
-  functions,
-  installed = true,
-  loadingData = true,
-  hasFunctionData = true,
-) => {
-  const component = Vue.extend(functionsComponent);
+describe('functionsComponent', () => {
+  let component;
+  let store;
+  let localVue;
+
+  beforeEach(() => {
+    localVue = createLocalVue();
+    localVue.use(Vuex);
 
-  return mountComponent(component, {
-    functions,
-    installed,
-    clustersPath: '/testClusterPath',
-    helpPath: '/helpPath',
-    loadingData,
-    hasFunctionData,
+    store = createStore();
   });
-};
 
-describe('functionsComponent', () => {
-  it('should render empty state when Knative is not installed', () => {
-    const vm = createComponent({}, false);
+  afterEach(() => {
+    component.vm.$destroy();
+  });
 
-    expect(vm.$el.querySelector('div.row').classList.contains('js-empty-state')).toBe(true);
-    expect(vm.$el.querySelector('h4.state-title').innerHTML.trim()).toEqual(
-      'Getting started with serverless',
-    );
+  it('should render empty state when Knative is not installed', () => {
+    component = shallowMount(functionsComponent, {
+      localVue,
+      store,
+      propsData: {
+        installed: false,
+        clustersPath: '',
+        helpPath: '',
+        statusPath: '',
+      },
+      sync: false,
+    });
 
-    vm.$destroy();
+    expect(component.vm.$el.querySelector('emptystate-stub')).not.toBe(null);
   });
 
   it('should render a loading component', () => {
-    const vm = createComponent({});
+    store.dispatch('requestFunctionsLoading');
+    component = shallowMount(functionsComponent, {
+      localVue,
+      store,
+      propsData: {
+        installed: true,
+        clustersPath: '',
+        helpPath: '',
+        statusPath: '',
+      },
+      sync: false,
+    });
 
-    expect(vm.$el.querySelector('.gl-responsive-table-row')).not.toBe(null);
-    expect(vm.$el.querySelector('div.animation-container')).not.toBe(null);
+    expect(component.vm.$el.querySelector('glloadingicon-stub')).not.toBe(null);
   });
 
   it('should render empty state when there is no function data', () => {
-    const vm = createComponent({}, true, false, false);
+    store.dispatch('receiveFunctionsNoDataSuccess');
+    component = shallowMount(functionsComponent, {
+      localVue,
+      store,
+      propsData: {
+        installed: true,
+        clustersPath: '',
+        helpPath: '',
+        statusPath: '',
+      },
+      sync: false,
+    });
 
     expect(
-      vm.$el.querySelector('.empty-state, .js-empty-state').classList.contains('js-empty-state'),
+      component.vm.$el
+        .querySelector('.empty-state, .js-empty-state')
+        .classList.contains('js-empty-state'),
     ).toBe(true);
 
-    expect(vm.$el.querySelector('h4.state-title').innerHTML.trim()).toEqual(
+    expect(component.vm.$el.querySelector('.state-title, .text-center').innerHTML.trim()).toEqual(
       'No functions available',
     );
-
-    vm.$destroy();
   });
 
   it('should render the functions list', () => {
-    const store = new ServerlessStore(false, '/cluster_path', 'help_path');
-    store.updateFunctionsFromServer(mockServerlessFunctions);
-    const vm = createComponent(store.state.functions, true, false);
+    component = shallowMount(functionsComponent, {
+      localVue,
+      store,
+      propsData: {
+        installed: true,
+        clustersPath: '',
+        helpPath: '',
+        statusPath: '',
+      },
+      sync: false,
+    });
+
+    component.vm.$store.dispatch('receiveFunctionsSuccess', mockServerlessFunctions);
 
-    expect(vm.$el.querySelector('div.groups-list-tree-container')).not.toBe(null);
-    expect(vm.$el.querySelector('#env-global').classList.contains('has-children')).toBe(true);
+    return component.vm.$nextTick().then(() => {
+      expect(component.vm.$el.querySelector('environmentrow-stub')).not.toBe(null);
+    });
   });
 });
diff --git a/spec/javascripts/serverless/components/missing_prometheus_spec.js b/spec/javascripts/serverless/components/missing_prometheus_spec.js
new file mode 100644
index 00000000000..77aca03772b
--- /dev/null
+++ b/spec/javascripts/serverless/components/missing_prometheus_spec.js
@@ -0,0 +1,37 @@
+import missingPrometheusComponent from '~/serverless/components/missing_prometheus.vue';
+import { shallowMount } from '@vue/test-utils';
+
+const createComponent = missingData =>
+  shallowMount(missingPrometheusComponent, {
+    propsData: {
+      clustersPath: '/clusters',
+      helpPath: '/help',
+      missingData,
+    },
+  }).vm;
+
+describe('missingPrometheusComponent', () => {
+  let vm;
+
+  afterEach(() => {
+    vm.$destroy();
+  });
+
+  it('should render missing prometheus message', () => {
+    vm = createComponent(false);
+
+    expect(vm.$el.querySelector('.state-description').innerHTML.trim()).toContain(
+      'Function invocation metrics require Prometheus to be installed first.',
+    );
+
+    expect(vm.$el.querySelector('glbutton-stub').getAttribute('variant')).toEqual('success');
+  });
+
+  it('should render no prometheus data message', () => {
+    vm = createComponent(true);
+
+    expect(vm.$el.querySelector('.state-description').innerHTML.trim()).toContain(
+      'Invocation metrics loading or not available at this time.',
+    );
+  });
+});
diff --git a/spec/javascripts/serverless/components/pod_box_spec.js b/spec/javascripts/serverless/components/pod_box_spec.js
new file mode 100644
index 00000000000..69ac1a2bb5f
--- /dev/null
+++ b/spec/javascripts/serverless/components/pod_box_spec.js
@@ -0,0 +1,22 @@
+import podBoxComponent from '~/serverless/components/pod_box.vue';
+import { shallowMount } from '@vue/test-utils';
+
+const createComponent = count =>
+  shallowMount(podBoxComponent, {
+    propsData: {
+      count,
+    },
+  }).vm;
+
+describe('podBoxComponent', () => {
+  it('should render three boxes', () => {
+    const count = 3;
+    const vm = createComponent(count);
+    const rects = vm.$el.querySelectorAll('rect');
+
+    expect(rects.length).toEqual(3);
+    expect(parseInt(rects[2].getAttribute('x'), 10)).toEqual(40);
+
+    vm.$destroy();
+  });
+});
diff --git a/spec/javascripts/serverless/components/url_spec.js b/spec/javascripts/serverless/components/url_spec.js
index 21a879a49bb..08c3e4146b1 100644
--- a/spec/javascripts/serverless/components/url_spec.js
+++ b/spec/javascripts/serverless/components/url_spec.js
@@ -1,15 +1,13 @@
 import Vue from 'vue';
-
 import urlComponent from '~/serverless/components/url.vue';
-import mountComponent from 'spec/helpers/vue_mount_component_helper';
-
-const createComponent = uri => {
-  const component = Vue.extend(urlComponent);
+import { shallowMount } from '@vue/test-utils';
 
-  return mountComponent(component, {
-    uri,
-  });
-};
+const createComponent = uri =>
+  shallowMount(Vue.extend(urlComponent), {
+    propsData: {
+      uri,
+    },
+  }).vm;
 
 describe('urlComponent', () => {
   it('should render correctly', () => {
@@ -17,9 +15,7 @@ describe('urlComponent', () => {
     const vm = createComponent(uri);
 
     expect(vm.$el.classList.contains('clipboard-group')).toBe(true);
-    expect(vm.$el.querySelector('.js-clipboard-btn').getAttribute('data-clipboard-text')).toEqual(
-      uri,
-    );
+    expect(vm.$el.querySelector('clipboardbutton-stub').getAttribute('text')).toEqual(uri);
 
     expect(vm.$el.querySelector('.url-text-field').innerHTML).toEqual(uri);
 
diff --git a/spec/javascripts/serverless/mock_data.js b/spec/javascripts/serverless/mock_data.js
index ecd393b174c..a2c18616324 100644
--- a/spec/javascripts/serverless/mock_data.js
+++ b/spec/javascripts/serverless/mock_data.js
@@ -77,3 +77,60 @@ export const mockMultilineServerlessFunction = {
   description: 'testfunc1\nA test service line\\nWith additional services',
   image: 'knative-test-container-buildtemplate',
 };
+
+export const mockMetrics = {
+  success: true,
+  last_update: '2019-02-28T19:11:38.926Z',
+  metrics: {
+    id: 22,
+    title: 'Knative function invocations',
+    required_metrics: ['container_memory_usage_bytes', 'container_cpu_usage_seconds_total'],
+    weight: 0,
+    y_label: 'Invocations',
+    queries: [
+      {
+        query_range:
+          'floor(sum(rate(istio_revision_request_count{destination_configuration="%{function_name}", destination_namespace="%{kube_namespace}"}[1m])*30))',
+        unit: 'requests',
+        label: 'invocations / minute',
+        result: [
+          {
+            metric: {},
+            values: [[1551352298.756, '0'], [1551352358.756, '0']],
+          },
+        ],
+      },
+    ],
+  },
+};
+
+export const mockNormalizedMetrics = {
+  id: 22,
+  title: 'Knative function invocations',
+  required_metrics: ['container_memory_usage_bytes', 'container_cpu_usage_seconds_total'],
+  weight: 0,
+  y_label: 'Invocations',
+  queries: [
+    {
+      query_range:
+        'floor(sum(rate(istio_revision_request_count{destination_configuration="%{function_name}", destination_namespace="%{kube_namespace}"}[1m])*30))',
+      unit: 'requests',
+      label: 'invocations / minute',
+      result: [
+        {
+          metric: {},
+          values: [
+            {
+              time: '2019-02-28T11:11:38.756Z',
+              value: 0,
+            },
+            {
+              time: '2019-02-28T11:12:38.756Z',
+              value: 0,
+            },
+          ],
+        },
+      ],
+    },
+  ],
+};
diff --git a/spec/javascripts/serverless/store/actions_spec.js b/spec/javascripts/serverless/store/actions_spec.js
new file mode 100644
index 00000000000..602798573e9
--- /dev/null
+++ b/spec/javascripts/serverless/store/actions_spec.js
@@ -0,0 +1,88 @@
+import MockAdapter from 'axios-mock-adapter';
+import statusCodes from '~/lib/utils/http_status';
+import { fetchFunctions, fetchMetrics } from '~/serverless/store/actions';
+import { mockServerlessFunctions, mockMetrics } from '../mock_data';
+import axios from '~/lib/utils/axios_utils';
+import testAction from '../../helpers/vuex_action_helper';
+import { adjustMetricQuery } from '../utils';
+
+describe('ServerlessActions', () => {
+  describe('fetchFunctions', () => {
+    it('should successfully fetch functions', done => {
+      const endpoint = '/functions';
+      const mock = new MockAdapter(axios);
+      mock.onGet(endpoint).reply(statusCodes.OK, JSON.stringify(mockServerlessFunctions));
+
+      testAction(
+        fetchFunctions,
+        { functionsPath: endpoint },
+        {},
+        [],
+        [
+          { type: 'requestFunctionsLoading' },
+          { type: 'receiveFunctionsSuccess', payload: mockServerlessFunctions },
+        ],
+        () => {
+          mock.restore();
+          done();
+        },
+      );
+    });
+
+    it('should successfully retry', done => {
+      const endpoint = '/functions';
+      const mock = new MockAdapter(axios);
+      mock.onGet(endpoint).reply(statusCodes.NO_CONTENT);
+
+      testAction(
+        fetchFunctions,
+        { functionsPath: endpoint },
+        {},
+        [],
+        [{ type: 'requestFunctionsLoading' }],
+        () => {
+          mock.restore();
+          done();
+        },
+      );
+    });
+  });
+
+  describe('fetchMetrics', () => {
+    it('should return no prometheus', done => {
+      const endpoint = '/metrics';
+      const mock = new MockAdapter(axios);
+      mock.onGet(endpoint).reply(statusCodes.NO_CONTENT);
+
+      testAction(
+        fetchMetrics,
+        { metricsPath: endpoint, hasPrometheus: false },
+        {},
+        [],
+        [{ type: 'receiveMetricsNoPrometheus' }],
+        () => {
+          mock.restore();
+          done();
+        },
+      );
+    });
+
+    it('should successfully fetch metrics', done => {
+      const endpoint = '/metrics';
+      const mock = new MockAdapter(axios);
+      mock.onGet(endpoint).reply(statusCodes.OK, JSON.stringify(mockMetrics));
+
+      testAction(
+        fetchMetrics,
+        { metricsPath: endpoint, hasPrometheus: true },
+        {},
+        [],
+        [{ type: 'receiveMetricsSuccess', payload: adjustMetricQuery(mockMetrics) }],
+        () => {
+          mock.restore();
+          done();
+        },
+      );
+    });
+  });
+});
diff --git a/spec/javascripts/serverless/store/getters_spec.js b/spec/javascripts/serverless/store/getters_spec.js
new file mode 100644
index 00000000000..fb549c8f153
--- /dev/null
+++ b/spec/javascripts/serverless/store/getters_spec.js
@@ -0,0 +1,43 @@
+import serverlessState from '~/serverless/store/state';
+import * as getters from '~/serverless/store/getters';
+import { mockServerlessFunctions } from '../mock_data';
+
+describe('Serverless Store Getters', () => {
+  let state;
+
+  beforeEach(() => {
+    state = serverlessState;
+  });
+
+  describe('hasPrometheusMissingData', () => {
+    it('should return false if Prometheus is not installed', () => {
+      state.hasPrometheus = false;
+
+      expect(getters.hasPrometheusMissingData(state)).toEqual(false);
+    });
+
+    it('should return false if Prometheus is installed and there is data', () => {
+      state.hasPrometheusData = true;
+
+      expect(getters.hasPrometheusMissingData(state)).toEqual(false);
+    });
+
+    it('should return true if Prometheus is installed and there is no data', () => {
+      state.hasPrometheus = true;
+      state.hasPrometheusData = false;
+
+      expect(getters.hasPrometheusMissingData(state)).toEqual(true);
+    });
+  });
+
+  describe('getFunctions', () => {
+    it('should translate the raw function array to group the functions per environment scope', () => {
+      state.functions = mockServerlessFunctions;
+
+      const funcs = getters.getFunctions(state);
+
+      expect(Object.keys(funcs)).toContain('*');
+      expect(funcs['*'].length).toEqual(2);
+    });
+  });
+});
diff --git a/spec/javascripts/serverless/store/mutations_spec.js b/spec/javascripts/serverless/store/mutations_spec.js
new file mode 100644
index 00000000000..ca3053e5c38
--- /dev/null
+++ b/spec/javascripts/serverless/store/mutations_spec.js
@@ -0,0 +1,86 @@
+import mutations from '~/serverless/store/mutations';
+import * as types from '~/serverless/store/mutation_types';
+import { mockServerlessFunctions, mockMetrics } from '../mock_data';
+
+describe('ServerlessMutations', () => {
+  describe('Functions List Mutations', () => {
+    it('should ensure loading is true', () => {
+      const state = {};
+
+      mutations[types.REQUEST_FUNCTIONS_LOADING](state);
+
+      expect(state.isLoading).toEqual(true);
+    });
+
+    it('should set proper state once functions are loaded', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_FUNCTIONS_SUCCESS](state, mockServerlessFunctions);
+
+      expect(state.isLoading).toEqual(false);
+      expect(state.hasFunctionData).toEqual(true);
+      expect(state.functions).toEqual(mockServerlessFunctions);
+    });
+
+    it('should ensure loading has stopped and hasFunctionData is false when there are no functions available', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_FUNCTIONS_NODATA_SUCCESS](state);
+
+      expect(state.isLoading).toEqual(false);
+      expect(state.hasFunctionData).toEqual(false);
+      expect(state.functions).toBe(undefined);
+    });
+
+    it('should ensure loading has stopped, and an error is raised', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_FUNCTIONS_ERROR](state, 'sample error');
+
+      expect(state.isLoading).toEqual(false);
+      expect(state.hasFunctionData).toEqual(false);
+      expect(state.functions).toBe(undefined);
+      expect(state.error).not.toBe(undefined);
+    });
+  });
+
+  describe('Function Details Metrics Mutations', () => {
+    it('should ensure isLoading and hasPrometheus data flags indicate data is loaded', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_METRICS_SUCCESS](state, mockMetrics);
+
+      expect(state.isLoading).toEqual(false);
+      expect(state.hasPrometheusData).toEqual(true);
+      expect(state.graphData).toEqual(mockMetrics);
+    });
+
+    it('should ensure isLoading and hasPrometheus data flags are cleared indicating no functions available', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_METRICS_NODATA_SUCCESS](state);
+
+      expect(state.isLoading).toEqual(false);
+      expect(state.hasPrometheusData).toEqual(false);
+      expect(state.graphData).toBe(undefined);
+    });
+
+    it('should properly indicate an error', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_METRICS_ERROR](state, 'sample error');
+
+      expect(state.hasPrometheusData).toEqual(false);
+      expect(state.error).not.toBe(undefined);
+    });
+
+    it('should properly indicate when prometheus is installed', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_METRICS_NO_PROMETHEUS](state);
+
+      expect(state.hasPrometheus).toEqual(false);
+      expect(state.hasPrometheusData).toEqual(false);
+    });
+  });
+});
diff --git a/spec/javascripts/serverless/stores/serverless_store_spec.js b/spec/javascripts/serverless/stores/serverless_store_spec.js
deleted file mode 100644
index 72fd903d7d1..00000000000
--- a/spec/javascripts/serverless/stores/serverless_store_spec.js
+++ /dev/null
@@ -1,36 +0,0 @@
-import ServerlessStore from '~/serverless/stores/serverless_store';
-import { mockServerlessFunctions, mockServerlessFunctionsDiffEnv } from '../mock_data';
-
-describe('Serverless Functions Store', () => {
-  let store;
-
-  beforeEach(() => {
-    store = new ServerlessStore(false, '/cluster_path', 'help_path');
-  });
-
-  describe('#updateFunctionsFromServer', () => {
-    it('should pass an empty hash object', () => {
-      store.updateFunctionsFromServer();
-
-      expect(store.state.functions).toEqual({});
-    });
-
-    it('should group functions to one global environment', () => {
-      const mockServerlessData = mockServerlessFunctions;
-      store.updateFunctionsFromServer(mockServerlessData);
-
-      expect(Object.keys(store.state.functions)).toEqual(jasmine.objectContaining(['*']));
-      expect(store.state.functions['*'].length).toEqual(2);
-    });
-
-    it('should group functions to multiple environments', () => {
-      const mockServerlessData = mockServerlessFunctionsDiffEnv;
-      store.updateFunctionsFromServer(mockServerlessData);
-
-      expect(Object.keys(store.state.functions)).toEqual(jasmine.objectContaining(['*']));
-      expect(store.state.functions['*'].length).toEqual(1);
-      expect(store.state.functions.test.length).toEqual(1);
-      expect(store.state.functions.test[0].name).toEqual('testfunc2');
-    });
-  });
-});
diff --git a/spec/javascripts/serverless/utils.js b/spec/javascripts/serverless/utils.js
new file mode 100644
index 00000000000..5ce2e37d493
--- /dev/null
+++ b/spec/javascripts/serverless/utils.js
@@ -0,0 +1,20 @@
+export const adjustMetricQuery = data => {
+  const updatedMetric = data.metrics;
+
+  const queries = data.metrics.queries.map(query => ({
+    ...query,
+    result: query.result.map(result => ({
+      ...result,
+      values: result.values.map(([timestamp, value]) => ({
+        time: new Date(timestamp * 1000).toISOString(),
+        value: Number(value),
+      })),
+    })),
+  }));
+
+  updatedMetric.queries = queries;
+  return updatedMetric;
+};
+
+// prevent babel-plugin-rewire from generating an invalid default during karma tests
+export default () => {};
diff --git a/spec/lib/gitlab/prometheus/queries/knative_invocation_query_spec.rb b/spec/lib/gitlab/prometheus/queries/knative_invocation_query_spec.rb
new file mode 100644
index 00000000000..7f6283715f2
--- /dev/null
+++ b/spec/lib/gitlab/prometheus/queries/knative_invocation_query_spec.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Prometheus::Queries::KnativeInvocationQuery do
+  include PrometheusHelpers
+
+  let(:project) { create(:project) }
+  let(:serverless_func) { Serverless::Function.new(project, 'test-name', 'test-ns') }
+
+  let(:client) { double('prometheus_client') }
+  subject { described_class.new(client) }
+
+  context 'verify queries' do
+    before do
+      allow(PrometheusMetric).to receive(:find_by_identifier).and_return(create(:prometheus_metric, query: prometheus_istio_query('test-name', 'test-ns')))
+      allow(client).to receive(:query_range)
+    end
+
+    it 'has the query, but no data' do
+      results = subject.query(serverless_func.id)
+
+      expect(results.queries[0][:query_range]).to eql('floor(sum(rate(istio_revision_request_count{destination_configuration="test-name", destination_namespace="test-ns"}[1m])*30))')
+    end
+  end
+end
diff --git a/spec/models/serverless/function_spec.rb b/spec/models/serverless/function_spec.rb
new file mode 100644
index 00000000000..1854d5f9415
--- /dev/null
+++ b/spec/models/serverless/function_spec.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Serverless::Function do
+  let(:project) { create(:project) }
+  let(:func) { described_class.new(project, 'test', 'test-ns') }
+
+  it 'has a proper id' do
+    expect(func.id).to eql("#{project.id}/test/test-ns")
+    expect(func.name).to eql("test")
+    expect(func.namespace).to eql("test-ns")
+  end
+
+  it 'can decode an identifier' do
+    f = described_class.find_by_id("#{project.id}/testfunc/dummy-ns")
+
+    expect(f.name).to eql("testfunc")
+    expect(f.namespace).to eql("dummy-ns")
+  end
+end
diff --git a/spec/support/helpers/prometheus_helpers.rb b/spec/support/helpers/prometheus_helpers.rb
index 08d1d7a6059..87f825152cf 100644
--- a/spec/support/helpers/prometheus_helpers.rb
+++ b/spec/support/helpers/prometheus_helpers.rb
@@ -7,6 +7,10 @@ module PrometheusHelpers
     %{avg(rate(container_cpu_usage_seconds_total{container_name!="POD",environment="#{environment_slug}"}[2m])) * 100}
   end
 
+  def prometheus_istio_query(function_name, kube_namespace)
+    %{floor(sum(rate(istio_revision_request_count{destination_configuration=\"#{function_name}\", destination_namespace=\"#{kube_namespace}\"}[1m])*30))}
+  end
+
   def prometheus_ping_url(prometheus_query)
     query = { query: prometheus_query }.to_query