1 files changed, 110 insertions, 0 deletions
diff --git a/spec/javascripts/lib/utils/text_utility_spec.js b/spec/javascripts/lib/utils/text_utility_spec.js
new file mode 100644
index 00000000000..4200e943121
--- /dev/null
+++ b/spec/javascripts/lib/utils/text_utility_spec.js
@@ -0,0 +1,110 @@
+require('~/lib/utils/text_utility');
+
+(() => {
+  describe('text_utility', () => {
+    describe('gl.text.getTextWidth', () => {
+      it('returns zero width when no text is passed', () => {
+        expect(gl.text.getTextWidth('')).toBe(0);
+      });
+
+      it('returns zero width when no text is passed and font is passed', () => {
+        expect(gl.text.getTextWidth('', '100px sans-serif')).toBe(0);
+      });
+
+      it('returns width when text is passed', () => {
+        expect(gl.text.getTextWidth('foo') > 0).toBe(true);
+      });
+
+      it('returns bigger width when font is larger', () => {
+        const largeFont = gl.text.getTextWidth('foo', '100px sans-serif');
+        const regular = gl.text.getTextWidth('foo', '10px sans-serif');
+        expect(largeFont > regular).toBe(true);
+      });
+    });
+
+    describe('gl.text.pluralize', () => {
+      it('returns pluralized', () => {
+        expect(gl.text.pluralize('test', 2)).toBe('tests');
+      });
+
+      it('returns pluralized when count is 0', () => {
+        expect(gl.text.pluralize('test', 0)).toBe('tests');
+      });
+
+      it('does not return pluralized', () => {
+        expect(gl.text.pluralize('test', 1)).toBe('test');
+      });
+    });
+
+    describe('gl.text.highCountTrim', () => {
+      it('returns 99+ for count >= 100', () => {
+        expect(gl.text.highCountTrim(105)).toBe('99+');
+        expect(gl.text.highCountTrim(100)).toBe('99+');
+      });
+
+      it('returns exact number for count < 100', () => {
+        expect(gl.text.highCountTrim(45)).toBe(45);
+      });
+    });
+
+    describe('gl.text.insertText', () => {
+      let textArea;
+
+      beforeAll(() => {
+        textArea = document.createElement('textarea');
+        document.querySelector('body').appendChild(textArea);
+      });
+
+      afterAll(() => {
+        textArea.parentNode.removeChild(textArea);
+      });
+
+      describe('without selection', () => {
+        it('inserts the tag on an empty line', () => {
+          const initialValue = '';
+
+          textArea.value = initialValue;
+          textArea.selectionStart = 0;
+          textArea.selectionEnd = 0;
+
+          gl.text.insertText(textArea, textArea.value, '*', null, '', false);
+
+          expect(textArea.value).toEqual(`${initialValue}* `);
+        });
+
+        it('inserts the tag on a new line if the current one is not empty', () => {
+          const initialValue = 'some text';
+
+          textArea.value = initialValue;
+          textArea.setSelectionRange(initialValue.length, initialValue.length);
+
+          gl.text.insertText(textArea, textArea.value, '*', null, '', false);
+
+          expect(textArea.value).toEqual(`${initialValue}\n* `);
+        });
+
+        it('inserts the tag on the same line if the current line only contains spaces', () => {
+          const initialValue = '  ';
+
+          textArea.value = initialValue;
+          textArea.setSelectionRange(initialValue.length, initialValue.length);
+
+          gl.text.insertText(textArea, textArea.value, '*', null, '', false);
+
+          expect(textArea.value).toEqual(`${initialValue}* `);
+        });
+
+        it('inserts the tag on the same line if the current line only contains tabs', () => {
+          const initialValue = '\t\t\t';
+
+          textArea.value = initialValue;
+          textArea.setSelectionRange(initialValue.length, initialValue.length);
+
+          gl.text.insertText(textArea, textArea.value, '*', null, '', false);
+
+          expect(textArea.value).toEqual(`${initialValue}* `);
+        });
+      });
+    });
+  });
+})();