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{
This file is part of the Free Pascal Run time library.
Copyright (c) 2021 by Michael Van Canneyt (michael@freepascal.org)
Test cases for expression parser support
See the File COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit tcexmustache;
{$mode ObjFPC}{$H+}
interface
uses
Classes, SysUtils, fpcunit, fpjson, testregistry, fpmustache, tcbasemustache, fpexmustache, fpexprpars;
Type
{ TTestExMustacheParser }
TTestExMustacheParser = Class(TBaseMustacheTest)
private
FExpr: TFPExpressionParser;
FOutput: TMustacheStringOutput;
FContext : TMustacheJSONContext;
FData : TJSONData;
procedure GetVar(var Result: TFPExpressionResult; ConstRef
AName: ShortString);
Public
Procedure SetUp; override;
Procedure TearDown; override;
Function CreateParser: TMustacheParser; override;
Property Expr : TFPExpressionParser Read FExpr;
Property Output : TMustacheStringOutput Read FOutput;
Published
Procedure TestSimple;
Procedure TestRenderSimple;
Procedure TestRenderSection;
end;
{ TTestMustacheExpr }
TTestMustacheExpr = Class(TTestCase)
private
FJSON: TJSONObject;
FMustache: TMustacheExpr;
public
Procedure SetUp; override;
Procedure TearDown; override;
Property Mustache : TMustacheExpr Read FMustache;
Property JSON : TJSONObject Read FJSON;
Published
Procedure TestEmpty;
Procedure TestRegisterVariables;
Procedure TestRenderSection;
procedure TestRenderSectionStaticVariables;
end;
implementation
Const
STestJSON = '{ "data" : [ { "name": "me", "age" : 10}, { "name": "you", "age" : 12 }, { "name": "he", "age" : 13 } ] }';
{ TTestMustacheExpr }
procedure TTestMustacheExpr.SetUp;
begin
inherited SetUp;
FMustache:=TMustacheExpr.Create(Nil);
FJSON:=GetJSON(STestJSON) as TJSONObject;
end;
procedure TTestMustacheExpr.TearDown;
begin
FreeAndNil(FJSON);
FreeAndNil(FMustache);
inherited TearDown;
end;
procedure TTestMustacheExpr.TestEmpty;
begin
AssertNotNull('Have mustache instance',Mustache);
AssertNotNull('Have mustache expression engine instance',Mustache.ExpressionParser);
end;
procedure TTestMustacheExpr.TestRegisterVariables;
begin
Mustache.RegisterVariables(JSON,'data[0]',True);
AssertEquals('Variable count',2,Mustache.ExpressionParser.Identifiers.Count);
AssertEquals('Variable 0','name',Mustache.ExpressionParser.Identifiers[0].Name);
AssertEquals('Variable 1','age',Mustache.ExpressionParser.Identifiers[1].Name);
AssertTrue('Variable 0 type',rtString=Mustache.ExpressionParser.Identifiers[0].ResultType);
AssertTrue('Variable 1 type',rtInteger=Mustache.ExpressionParser.Identifiers[1].ResultType);
end;
procedure TTestMustacheExpr.TestRenderSection;
Var
S : String;
Const
Template = '{{#data}}{{[name]}}:{{[age>11]}} {{/data}}';
begin
Mustache.Template:=Template;
Mustache.RegisterVariables(JSON,'data[0]',True);
S:=Mustache.Render(JSON);
AssertEquals('Correct result','me:False you:True he:True ',S);
end;
procedure TTestMustacheExpr.TestRenderSectionStaticVariables;
Var
S : String;
Const
Template = '{{#data}}{{[name]}}:{{[age>11]}} {{/data}}';
begin
Mustache.Template:=Template;
Mustache.RegisterVariables(JSON,'data[0]',False);
S:=Mustache.Render(JSON);
AssertEquals('Correct result','me:False me:False me:False ',S);
end;
{ TTestExMustacheParser }
procedure TTestExMustacheParser.SetUp;
begin
FExpr:=TFPExpressionParser.Create(Nil);
Foutput:=TMustacheStringOutput.Create;
inherited SetUp;
end;
procedure TTestExMustacheParser.TearDown;
begin
inherited TearDown;
FreeAndNil(FExpr);
FreeAndNil(Foutput);
FreeAndNil(FContext);
FreeAndNil(FData);
end;
function TTestExMustacheParser.CreateParser: TMustacheParser;
Var
P : TMustacheExprParser;
begin
P:=TMustacheExprParser.Create;
P.ExprParser:=FExpr;
Result:=P;
end;
procedure TTestExMustacheParser.TestSimple;
begin
Template:='{{[1+2]}}';
CallParser;
AssertElement(0,metVariable,'1+2',TMustacheExprElement);
end;
procedure TTestExMustacheParser.TestRenderSimple;
begin
TestSimple;
ParseResult.Children[0].Render(Nil,Output,'',False);
AssertEquals('Correct result','3',Output.Data);
end;
procedure TTestExMustacheParser.GetVar(Var Result : TFPExpressionResult; ConstRef AName : ShortString);
begin
Result.ResultType:=rtInteger;
Result.ResInteger:=StrToINt(FContext.GetTextValue('age'));
end;
procedure TTestExMustacheParser.TestRenderSection;
begin
FData:=GetJSON(STestJSON);
FContext:=TMustacheJSONContext.Create(FData,Nil);
FExpr.Identifiers.AddVariable('age',rtInteger,@GetVar);
Template:='{{#data}}{{{name}}}:{{[age>11]}} {{/data}}';
CallParser;
ParseResult.Render(FContext,Output,'',False);
AssertEquals('Correct result','me:False you:True he:True ',Output.Data);
end;
initialization
RegisterTests([TTestExMustacheParser,TTestMustacheExpr]);
end.
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