# Code coverage report for spec/data.js

## Statements: 17.6% (22 / 125) Branches: 0% (0 / 12) Functions: 6.98% (3 / 43) Lines: 17.6% (22 / 125) Ignored: none

All files » spec/ » data.js

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     /*global CompilerContext, Handlebars, handlebarsEnv, shouldThrow */
    describe('data', function() {
      it("passing in data to a compiled function that expects data - works with helpers", function() {
        var template = CompilerContext.compile("{{hello}}", {data: true});

        var helpers = {
          hello: function(options) {
            return options.data.adjective + " "  + this.noun;
          }
        };

        var result = template({noun: "cat"}, {helpers: helpers, data: {adjective: "happy"}});
        equals("happy cat", result, "Data output by helper");
      });

      it("data can be looked up via @foo", function() {
        var template = CompilerContext.compile("{{@hello}}");
        var result = template({}, { data: { hello: "hello" } });
        equals("hello", result, "@foo retrieves template data");
      });

      it("deep @foo triggers automatic top-level data", function() {
        var template = CompilerContext.compile('{{#let world="world"}}{{#if foo}}{{#if foo}}Hello {{@world}}{{/if}}{{/if}}{{/let}}');

        var helpers = Handlebars.createFrame(handlebarsEnv.helpers);

        helpers.let = function(options) {
          var frame = Handlebars.createFrame(options.data);

          for (var prop in options.hash) {
            frame[prop] = options.hash[prop];
          }
          return options.fn(this, { data: frame });
        };

        var result = template({ foo: true }, { helpers: helpers });
        equals("Hello world", result, "Automatic data was triggered");
      });

      it("parameter data can be looked up via @foo", function() {
        var template = CompilerContext.compile("{{hello @world}}");
        var helpers = {
          hello: function(noun) {
            return "Hello " + noun;
          }
        };

        var result = template({}, { helpers: helpers, data: { world: "world" } });
        equals("Hello world", result, "@foo as a parameter retrieves template data");
      });

      it("hash values can be looked up via @foo", function() {
        var template = CompilerContext.compile("{{hello noun=@world}}");
        var helpers = {
          hello: function(options) {
            return "Hello " + options.hash.noun;
          }
        };

        var result = template({}, { helpers: helpers, data: { world: "world" } });
        equals("Hello world", result, "@foo as a parameter retrieves template data");
      });

      it("nested parameter data can be looked up via @foo.bar", function() {
        var template = CompilerContext.compile("{{hello @world.bar}}");
        var helpers = {
          hello: function(noun) {
            return "Hello " + noun;
          }
        };

        var result = template({}, { helpers: helpers, data: { world: {bar: "world" } } });
        equals("Hello world", result, "@foo as a parameter retrieves template data");
      });

      it("nested parameter data does not fail with @world.bar", function() {
        var template = CompilerContext.compile("{{hello @world.bar}}");
        var helpers = {
          hello: function(noun) {
            return "Hello " + noun;
          }
        };

        var result = template({}, { helpers: helpers, data: { foo: {bar: "world" } } });
        equals("Hello undefined", result, "@foo as a parameter retrieves template data");
      });

      it("parameter data throws when using complex scope references", function() {
        var string = "{{#goodbyes}}{{text}} cruel {{@foo/../name}}! {{/goodbyes}}";

        shouldThrow(function() {
          CompilerContext.compile(string);
        }, Error);
      });

      it("data is inherited downstream", function() {
        var template = CompilerContext.compile("{{#let foo=1 bar=2}}{{#let foo=bar.baz}}{{@bar}}{{@foo}}{{/let}}{{@foo}}{{/let}}", { data: true });
        var helpers = {
          let: function(options) {
            var frame = Handlebars.createFrame(options.data);
            for (var prop in options.hash) {
              frame[prop] = options.hash[prop];
            }
            return options.fn(this, {data: frame});
          }
        };

        var result = template({ bar: { baz: "hello world" } }, { helpers: helpers, data: {} });
        equals("2hello world1", result, "data variables are inherited downstream");
      });

      it("passing in data to a compiled function that expects data - works with helpers in partials", function() {
        var template = CompilerContext.compile("{{>my_partial}}", {data: true});

        var partials = {
          my_partial: CompilerContext.compile("{{hello}}", {data: true})
        };

        var helpers = {
          hello: function(options) {
            return options.data.adjective + " "  + this.noun;
          }
        };

        var result = template({noun: "cat"}, {helpers: helpers, partials: partials, data: {adjective: "happy"}});
        equals("happy cat", result, "Data output by helper inside partial");
      });

      it("passing in data to a compiled function that expects data - works with helpers and parameters", function() {
        var template = CompilerContext.compile("{{hello world}}", {data: true});

        var helpers = {
          hello: function(noun, options) {
            return options.data.adjective + " "  + noun + (this.exclaim ? "!" : "");
          }
        };

        var result = template({exclaim: true, world: "world"}, {helpers: helpers, data: {adjective: "happy"}});
        equals("happy world!", result, "Data output by helper");
      });

      it("passing in data to a compiled function that expects data - works with block helpers", function() {
        var template = CompilerContext.compile("{{#hello}}{{world}}{{/hello}}", {data: true});

        var helpers = {
          hello: function(options) {
            return options.fn(this);
          },
          world: function(options) {
            return options.data.adjective + " world" + (this.exclaim ? "!" : "");
          }
        };

        var result = template({exclaim: true}, {helpers: helpers, data: {adjective: "happy"}});
        equals("happy world!", result, "Data output by helper");
      });

      it("passing in data to a compiled function that expects data - works with block helpers that use ..", function() {
        var template = CompilerContext.compile("{{#hello}}{{world ../zomg}}{{/hello}}", {data: true});

        var helpers = {
          hello: function(options) {
            return options.fn({exclaim: "?"});
          },
          world: function(thing, options) {
            return options.data.adjective + " " + thing + (this.exclaim || "");
          }
        };

        var result = template({exclaim: true, zomg: "world"}, {helpers: helpers, data: {adjective: "happy"}});
        equals("happy world?", result, "Data output by helper");
      });

      it("passing in data to a compiled function that expects data - data is passed to with block helpers where children use ..", function() {
        var template = CompilerContext.compile("{{#hello}}{{world ../zomg}}{{/hello}}", {data: true});

        var helpers = {
          hello: function(options) {
            return options.data.accessData + " " + options.fn({exclaim: "?"});
          },
          world: function(thing, options) {
            return options.data.adjective + " " + thing + (this.exclaim || "");
          }
        };

        var result = template({exclaim: true, zomg: "world"}, {helpers: helpers, data: {adjective: "happy", accessData: "#win"}});
        equals("#win happy world?", result, "Data output by helper");
      });

      it("you can override inherited data when invoking a helper", function() {
        var template = CompilerContext.compile("{{#hello}}{{world zomg}}{{/hello}}", {data: true});

        var helpers = {
          hello: function(options) {
            return options.fn({exclaim: "?", zomg: "world"}, { data: {adjective: "sad"} });
          },
          world: function(thing, options) {
            return options.data.adjective + " " + thing + (this.exclaim || "");
          }
        };

        var result = template({exclaim: true, zomg: "planet"}, {helpers: helpers, data: {adjective: "happy"}});
        equals("sad world?", result, "Overriden data output by helper");
      });

      it("you can override inherited data when invoking a helper with depth", function() {
        var template = CompilerContext.compile("{{#hello}}{{world ../zomg}}{{/hello}}", {data: true});

        var helpers = {
          hello: function(options) {
            return options.fn({exclaim: "?"}, { data: {adjective: "sad"} });
          },
          world: function(thing, options) {
            return options.data.adjective + " " + thing + (this.exclaim || "");
          }
        };

        var result = template({exclaim: true, zomg: "world"}, {helpers: helpers, data: {adjective: "happy"}});
        equals("sad world?", result, "Overriden data output by helper");
      });

      describe('@root', function() {
        it('the root context can be looked up via @root', function() {
          var template = CompilerContext.compile('{{@root.foo}}');
          var result = template({foo: 'hello'}, { data: {} });
          equals('hello', result);

          result = template({foo: 'hello'}, {});
          equals('hello', result);
        });
        it('passed root values take priority', function() {
          var template = CompilerContext.compile('{{@root.foo}}');
          var result = template({}, { data: {root: {foo: 'hello'} } });
          equals('hello', result);
        });
      });

      describe('nesting', function() {
        it('the root context can be looked up via @root', function() {
          var template = CompilerContext.compile('{{#helper}}{{#helper}}{{@./depth}} {{@../depth}} {{@../../depth}}{{/helper}}{{/helper}}');
          var result = template({foo: 'hello'}, {
            helpers: {
              helper: function(options) {
                var frame = Handlebars.createFrame(options.data);
                frame.depth = options.data.depth + 1;
                return options.fn(this, {data: frame});
              }
            },
            data: {
              depth: 0
            }
          });
          equals('2 1 0', result);
        });
      });
    });