Add appengine/gcloud/mustache dependencies.

pkg/mustache/test/spec/~lambdas.yml

Index: pkg/mustache/test/spec/~lambdas.yml
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+overview: |
+  Lambdas are a special-cased data type for use in interpolations and
+  sections.
+
+  When used as the data value for an Interpolation tag, the lambda MUST be
+  treatable as an arity 0 function, and invoked as such.  The returned value
+  MUST be rendered against the default delimiters, then interpolated in place
+  of the lambda.
+
+  When used as the data value for a Section tag, the lambda MUST be treatable
+  as an arity 1 function, and invoked as such (passing a String containing the
+  unprocessed section contents).  The returned value MUST be rendered against
+  the current delimiters, then interpolated in place of the section.
+tests:
+  - name: Interpolation
+    desc: A lambda's return value should be interpolated.
+    data:
+      lambda: !code
+        ruby:    'proc { "world" }'
+        perl:    'sub { "world" }'
+        js:      'function() { return "world" }'
+        php:     'return "world";'
+        python:  'lambda: "world"'
+        clojure: '(fn [] "world")'
+    template: "Hello, {{lambda}}!"
+    expected: "Hello, world!"
+
+  - name: Interpolation - Expansion
+    desc: A lambda's return value should be parsed.
+    data:
+      planet: "world"
+      lambda: !code
+        ruby:    'proc { "{{planet}}" }'
+        perl:    'sub { "{{planet}}" }'
+        js:      'function() { return "{{planet}}" }'
+        php:     'return "{{planet}}";'
+        python:  'lambda: "{{planet}}"'
+        clojure: '(fn [] "{{planet}}")'
+    template: "Hello, {{lambda}}!"
+    expected: "Hello, world!"
+
+  - name: Interpolation - Alternate Delimiters
+    desc: A lambda's return value should parse with the default delimiters.
+    data:
+      planet: "world"
+      lambda: !code
+        ruby:    'proc { "|planet| => {{planet}}" }'
+        perl:    'sub { "|planet| => {{planet}}" }'
+        js:      'function() { return "|planet| => {{planet}}" }'
+        php:     'return "|planet| => {{planet}}";'
+        python:  'lambda: "|planet| => {{planet}}"'
+        clojure: '(fn [] "|planet| => {{planet}}")'
+    template: "{{= | | =}}\nHello, (|&lambda|)!"
+    expected: "Hello, (|planet| => world)!"
+
+  - name: Interpolation - Multiple Calls
+    desc: Interpolated lambdas should not be cached.
+    data:
+      lambda: !code
+        ruby:    'proc { $calls ||= 0; $calls += 1 }'
+        perl:    'sub { no strict; $calls += 1 }'
+        js:      'function() { return (g=(function(){return this})()).calls=(g.calls||0)+1 }'
+        php:     'global $calls; return ++$calls;'
+        python:  'lambda: globals().update(calls=globals().get("calls",0)+1) or calls'
+        clojure: '(def g (atom 0)) (fn [] (swap! g inc))'
+    template: '{{lambda}} == {{{lambda}}} == {{lambda}}'
+    expected: '1 == 2 == 3'
+
+  - name: Escaping
+    desc: Lambda results should be appropriately escaped.
+    data:
+      lambda: !code
+        ruby:    'proc { ">" }'
+        perl:    'sub { ">" }'
+        js:      'function() { return ">" }'
+        php:     'return ">";'
+        python:  'lambda: ">"'
+        clojure: '(fn [] ">")'
+    template: "<{{lambda}}{{{lambda}}}"
+    expected: "<&gt;>"
+
+  - name: Section
+    desc: Lambdas used for sections should receive the raw section string.
+    data:
+      x: 'Error!'
+      lambda: !code
+        ruby:    'proc { |text| text == "{{x}}" ? "yes" : "no" }'
+        perl:    'sub { $_[0] eq "{{x}}" ? "yes" : "no" }'
+        js:      'function(txt) { return (txt == "{{x}}" ? "yes" : "no") }'
+        php:     'return ($text == "{{x}}") ? "yes" : "no";'
+        python:  'lambda text: text == "{{x}}" and "yes" or "no"'
+        clojure: '(fn [text] (if (= text "{{x}}") "yes" "no"))'
+    template: "<{{#lambda}}{{x}}{{/lambda}}>"
+    expected: "<yes>"
+
+  - name: Section - Expansion
+    desc: Lambdas used for sections should have their results parsed.
+    data:
+      planet: "Earth"
+      lambda: !code
+        ruby:    'proc { |text| "#{text}{{planet}}#{text}" }'
+        perl:    'sub { $_[0] . "{{planet}}" . $_[0] }'
+        js:      'function(txt) { return txt + "{{planet}}" + txt }'
+        php:     'return $text . "{{planet}}" . $text;'
+        python:  'lambda text: "%s{{planet}}%s" % (text, text)'
+        clojure: '(fn [text] (str text "{{planet}}" text))'
+    template: "<{{#lambda}}-{{/lambda}}>"
+    expected: "<-Earth->"
+
+  - name: Section - Alternate Delimiters
+    desc: Lambdas used for sections should parse with the current delimiters.
+    data:
+      planet: "Earth"
+      lambda: !code
+        ruby:    'proc { |text| "#{text}{{planet}} => |planet|#{text}" }'
+        perl:    'sub { $_[0] . "{{planet}} => |planet|" . $_[0] }'
+        js:      'function(txt) { return txt + "{{planet}} => |planet|" + txt }'
+        php:     'return $text . "{{planet}} => |planet|" . $text;'
+        python:  'lambda text: "%s{{planet}} => |planet|%s" % (text, text)'
+        clojure: '(fn [text] (str text "{{planet}} => |planet|" text))'
+    template: "{{= | | =}}<|#lambda|-|/lambda|>"
+    expected: "<-{{planet}} => Earth->"
+
+  - name: Section - Multiple Calls
+    desc: Lambdas used for sections should not be cached.
+    data:
+      lambda: !code
+        ruby:    'proc { |text| "__#{text}__" }'
+        perl:    'sub { "__" . $_[0] . "__" }'
+        js:      'function(txt) { return "__" + txt + "__" }'
+        php:     'return "__" . $text . "__";'
+        python:  'lambda text: "__%s__" % (text)'
+        clojure: '(fn [text] (str "__" text "__"))'
+    template: '{{#lambda}}FILE{{/lambda}} != {{#lambda}}LINE{{/lambda}}'
+    expected: '__FILE__ != __LINE__'
+
+  - name: Inverted Section
+    desc: Lambdas used for inverted sections should be considered truthy.
+    data:
+      static: 'static'
+      lambda: !code
+        ruby:    'proc { |text| false }'
+        perl:    'sub { 0 }'
+        js:      'function(txt) { return false }'
+        php:     'return false;'
+        python:  'lambda text: 0'
+        clojure: '(fn [text] false)'
+    template: "<{{^lambda}}{{static}}{{/lambda}}>"
+    expected: "<>"