Missing partials should be treated as empty strings.

3 files changed, 11 insertions, 3 deletions

diff --git a/specs/partials.json b/specs/partials.json
index b4d592e..ac531da 100644
--- a/specs/partials.json
+++ b/specs/partials.json
@@ -1 +1 @@
-{"__ATTN__":"Do not edit this file; changes belong in the appropriate YAML file.","overview":"Partial tags are used to expand an external template into the current\ntemplate.\n\nThe tag's content MUST be a non-whitespace character sequence NOT containing\nthe current closing delimiter.\n\nThis tag's content names the partial to inject.  Set Delimiter tags MUST NOT\naffect the parsing of a partial.  The partial MUST be rendered against the\ncontext stack local to the tag.\n\nPartial tags SHOULD be treated as standalone when appropriate.  If this tag\nis used standalone, any whitespace preceding the tag should treated as\nindentation, and prepended to each line of the partial before rendering.\n","tests":[{"name":"Basic Behavior","data":{},"expected":"\"from partial\"","template":"\"{{>text}}\"","desc":"The greater-than operator should expand to the named partial.","partials":{"text":"from partial"}},{"name":"Context","data":{"text":"content"},"expected":"\"*content*\"","template":"\"{{>partial}}\"","desc":"The greater-than operator should operate within the current context.","partials":{"partial":"*{{text}}*"}},{"name":"Recursion","data":{"content":"X","nodes":[{"content":"Y","nodes":[]}]},"expected":"X<Y<>>","template":"{{>node}}","desc":"The greater-than operator should properly recurse.","partials":{"node":"{{content}}<{{#nodes}}{{>node}}{{/nodes}}>"}},{"name":"Surrounding Whitespace","data":{},"expected":"| \t|\t |","template":"| {{>partial}} |","desc":"The greater-than operator should not alter surrounding whitespace.","partials":{"partial":"\t|\t"}},{"name":"Inline Indentation","data":{"data":"|"},"expected":"  |  >\n>\n","template":"  {{data}}  {{> partial}}\n","desc":"Whitespace should be left untouched.","partials":{"partial":">\n>"}},{"name":"Standalone Line Endings","data":{},"expected":"|\r\n>|","template":"|\r\n{{>partial}}\r\n|","desc":"\"\\r\\n\" should be considered a newline for standalone tags.","partials":{"partial":">"}},{"name":"Standalone Without Previous Line","data":{},"expected":"  >\n  >>","template":"  {{>partial}}\n>","desc":"Standalone tags should not require a newline to precede them.","partials":{"partial":">\n>"}},{"name":"Standalone Without Newline","data":{},"expected":">\n  >\n  >","template":">\n  {{>partial}}","desc":"Standalone tags should not require a newline to follow them.","partials":{"partial":">\n>"}},{"name":"Standalone Indentation","data":{"content":"<\n->"},"expected":"\\\n |\n <\n->\n |\n/\n","template":"\\\n {{>partial}}\n/\n","desc":"Each line of the partial should be indented before rendering.","partials":{"partial":"|\n{{{content}}}\n|\n"}},{"name":"Padding Whitespace","data":{"boolean":true},"expected":"|[]|","template":"|{{> partial }}|","desc":"Superfluous in-tag whitespace should be ignored.","partials":{"partial":"[]"}}]}
\ No newline at end of file
+{"__ATTN__":"Do not edit this file; changes belong in the appropriate YAML file.","overview":"Partial tags are used to expand an external template into the current\ntemplate.\n\nThe tag's content MUST be a non-whitespace character sequence NOT containing\nthe current closing delimiter.\n\nThis tag's content names the partial to inject.  Set Delimiter tags MUST NOT\naffect the parsing of a partial.  The partial MUST be rendered against the\ncontext stack local to the tag.  If the named partial cannot be found, the\nempty string SHOULD be used instead, as in interpolations.\n\nPartial tags SHOULD be treated as standalone when appropriate.  If this tag\nis used standalone, any whitespace preceding the tag should treated as\nindentation, and prepended to each line of the partial before rendering.\n","tests":[{"name":"Basic Behavior","data":{},"expected":"\"from partial\"","template":"\"{{>text}}\"","desc":"The greater-than operator should expand to the named partial.","partials":{"text":"from partial"}},{"name":"Failed Lookup","data":{},"expected":"\"from partial\"","template":"\"{{>text}}\"","desc":"The empty string should be used when the named partial is not found.","partials":{}},{"name":"Context","data":{"text":"content"},"expected":"\"*content*\"","template":"\"{{>partial}}\"","desc":"The greater-than operator should operate within the current context.","partials":{"partial":"*{{text}}*"}},{"name":"Recursion","data":{"content":"X","nodes":[{"content":"Y","nodes":[]}]},"expected":"X<Y<>>","template":"{{>node}}","desc":"The greater-than operator should properly recurse.","partials":{"node":"{{content}}<{{#nodes}}{{>node}}{{/nodes}}>"}},{"name":"Surrounding Whitespace","data":{},"expected":"| \t|\t |","template":"| {{>partial}} |","desc":"The greater-than operator should not alter surrounding whitespace.","partials":{"partial":"\t|\t"}},{"name":"Inline Indentation","data":{"data":"|"},"expected":"  |  >\n>\n","template":"  {{data}}  {{> partial}}\n","desc":"Whitespace should be left untouched.","partials":{"partial":">\n>"}},{"name":"Standalone Line Endings","data":{},"expected":"|\r\n>|","template":"|\r\n{{>partial}}\r\n|","desc":"\"\\r\\n\" should be considered a newline for standalone tags.","partials":{"partial":">"}},{"name":"Standalone Without Previous Line","data":{},"expected":"  >\n  >>","template":"  {{>partial}}\n>","desc":"Standalone tags should not require a newline to precede them.","partials":{"partial":">\n>"}},{"name":"Standalone Without Newline","data":{},"expected":">\n  >\n  >","template":">\n  {{>partial}}","desc":"Standalone tags should not require a newline to follow them.","partials":{"partial":">\n>"}},{"name":"Standalone Indentation","data":{"content":"<\n->"},"expected":"\\\n |\n <\n->\n |\n/\n","template":"\\\n {{>partial}}\n/\n","desc":"Each line of the partial should be indented before rendering.","partials":{"partial":"|\n{{{content}}}\n|\n"}},{"name":"Padding Whitespace","data":{"boolean":true},"expected":"|[]|","template":"|{{> partial }}|","desc":"Superfluous in-tag whitespace should be ignored.","partials":{"partial":"[]"}}]}
\ No newline at end of file
diff --git a/specs/partials.yml b/specs/partials.yml
index e24ca56..d688bd6 100644
--- a/specs/partials.yml
+++ b/specs/partials.yml
@@ -7,7 +7,8 @@ overview: |
 
   This tag's content names the partial to inject.  Set Delimiter tags MUST NOT
   affect the parsing of a partial.  The partial MUST be rendered against the
-  context stack local to the tag.
+  context stack local to the tag.  If the named partial cannot be found, the
+  empty string SHOULD be used instead, as in interpolations.
 
   Partial tags SHOULD be treated as standalone when appropriate.  If this tag
   is used standalone, any whitespace preceding the tag should treated as
@@ -20,6 +21,13 @@ tests:
     partials: { text: 'from partial' }
     expected: '"from partial"'
 
+  - name: Failed Lookup
+    desc: The empty string should be used when the named partial is not found.
+    data: { }
+    template: '"{{>text}}"'
+    partials: { }
+    expected: '"from partial"'
+
   - name: Context
     desc: The greater-than operator should operate within the current context.
     data: { text: 'content' }
diff --git a/specs/~lambdas.json b/specs/~lambdas.json
index eac6429..b2e288c 100644
--- a/specs/~lambdas.json
+++ b/specs/~lambdas.json
@@ -1 +1 @@
-{"__ATTN__":"Do not edit this file; changes belong in the appropriate YAML file.","overview":"Lambdas are a special-cased data type for use in interpolations and\nsections.\n\nWhen used as the data value for an Interpolation tag, the lambda MUST be\ntreatable as an arity 0 function, and invoked as such.  The returned value\nMUST be rendered, then interpolated in place of the lambda.\n\nWhen used as the data value for a Section tag, the lambda MUST be treatable\nas an arity 1 function, and invoked as such (passing a String containing the\nunprocessed section contents).  The returned value MUST be rendered, then\ninterpolated in place of the section.\n","tests":[{"name":"Interpolation","data":{"lambda":{"php":"return \"world\";","__tag__":"code","perl":"sub { \"world\" }","python":"lambda: \"world\"","ruby":"proc { \"world\" }","js":"function() { return \"world\" }"}},"expected":"Hello, world!","template":"Hello, {{lambda}}!","desc":"A lambda's return value should be interpolated."},{"name":"Interpolation - Expansion","data":{"planet":"world","lambda":{"php":"return \"{{planet}}\";","__tag__":"code","perl":"sub { \"{{planet}}\" }","python":"lambda: \"{{planet}}\"","ruby":"proc { \"{{planet}}\" }","js":"function() { return \"{{planet}}\" }"}},"expected":"Hello, world!","template":"Hello, {{lambda}}!","desc":"A lambda's return value should be parsed."},{"name":"Interpolation - Multiple Calls","data":{"lambda":{"php":"global $calls; return ++$calls;","__tag__":"code","perl":"sub { no strict; $calls += 1 }","python":"lambda: globals().update(calls=globals().get(\"calls\",0)+1) or calls","ruby":"proc { $calls ||= 0; $calls += 1 }","js":"function() { return (g=(function(){return this})()).calls=(g.calls||0)+1 }"}},"expected":"1 == 2 == 3","template":"{{lambda}} == {{{lambda}}} == {{lambda}}","desc":"Interpolated lambdas should not be cached."},{"name":"Escaping","data":{"lambda":{"php":"return \">\";","__tag__":"code","perl":"sub { \">\" }","python":"lambda: \">\"","ruby":"proc { \">\" }","js":"function() { return \">\" }"}},"expected":"<&gt;>","template":"<{{lambda}}{{{lambda}}}","desc":"Lambda results should be appropriately escaped."},{"name":"Section","data":{"x":"Error!","lambda":{"php":"return ($text == \"{{x}}\") ? \"yes\" : \"no\";","__tag__":"code","perl":"sub { $_[0] eq \"{{x}}\" ? \"yes\" : \"no\" }","python":"lambda text: text == \"{{x}}\" and \"yes\" or \"no\"","ruby":"proc { |text| text == \"{{x}}\" ? \"yes\" : \"no\" }","js":"function(txt) { return (txt == \"{{x}}\" ? \"yes\" : \"no\") }"}},"expected":"<yes>","template":"<{{#lambda}}{{x}}{{/lambda}}>","desc":"Lambdas used for sections should receive the raw section string."},{"name":"Section - Expansion","data":{"planet":"Earth","lambda":{"php":"return $text . \"{{planet}}\" . $text;","__tag__":"code","perl":"sub { $_[0] . \"{{planet}}\" . $_[0] }","python":"lambda text: \"%s{{planet}}%s\" % (text, text)","ruby":"proc { |text| \"#{text}{{planet}}#{text}\" }","js":"function(txt) { return txt + \"{{planet}}\" + txt }"}},"expected":"<-Earth->","template":"<{{#lambda}}-{{/lambda}}>","desc":"Lambdas used for sections should have their results parsed."},{"name":"Section - Multiple Calls","data":{"lambda":{"php":"return \"__\" . $text . \"__\";","__tag__":"code","perl":"sub { \"__\" . $_[0] . \"__\" }","python":"lambda text: \"__%s__\" % (text)","ruby":"proc { |text| \"__#{text}__\" }","js":"function(txt) { return \"__\" + txt + \"__\" }"}},"expected":"__FILE__ != __LINE__","template":"{{#lambda}}FILE{{/lambda}} != {{#lambda}}LINE{{/lambda}}","desc":"Lambdas used for sections should not be cached."},{"name":"Inverted Section","data":{"static":"static","lambda":{"php":"return false;","__tag__":"code","perl":"sub { 0 }","python":"lambda text: 0","ruby":"proc { |text| false }","js":"function(txt) { return false }"}},"expected":"<>","template":"<{{^lambda}}{{static}}{{/lambda}}>","desc":"Lambdas used for inverted sections should be considered truthy."}]}
\ No newline at end of file
+{"__ATTN__":"Do not edit this file; changes belong in the appropriate YAML file.","overview":"Lambdas are a special-cased data type for use in interpolations and\nsections.\n\nWhen used as the data value for an Interpolation tag, the lambda MUST be\ntreatable as an arity 0 function, and invoked as such.  The returned value\nMUST be rendered against the default delimiters, then interpolated in place\nof the lambda.\n\nWhen used as the data value for a Section tag, the lambda MUST be treatable\nas an arity 1 function, and invoked as such (passing a String containing the\nunprocessed section contents).  The returned value MUST be rendered against\nthe current delimiters, then interpolated in place of the section.\n","tests":[{"name":"Interpolation","data":{"lambda":{"php":"return \"world\";","__tag__":"code","perl":"sub { \"world\" }","python":"lambda: \"world\"","ruby":"proc { \"world\" }","js":"function() { return \"world\" }"}},"expected":"Hello, world!","template":"Hello, {{lambda}}!","desc":"A lambda's return value should be interpolated."},{"name":"Interpolation - Expansion","data":{"planet":"world","lambda":{"php":"return \"{{planet}}\";","__tag__":"code","perl":"sub { \"{{planet}}\" }","python":"lambda: \"{{planet}}\"","ruby":"proc { \"{{planet}}\" }","js":"function() { return \"{{planet}}\" }"}},"expected":"Hello, world!","template":"Hello, {{lambda}}!","desc":"A lambda's return value should be parsed."},{"name":"Interpolation - Alternate Delimiters","data":{"planet":"world","lambda":{"php":"return \"|planet| => {{planet}}\";","__tag__":"code","perl":"sub { \"|planet| => {{planet}}\" }","python":"lambda: \"|planet| => {{planet}}\"","ruby":"proc { \"|planet| => {{planet}}\" }","js":"function() { return \"|planet| => {{planet}}\" }"}},"expected":"Hello, (|planet| => world)!","template":"{{= | | =}}\nHello, (|&lambda|)!","desc":"A lambda's return value should parse with the default delimiters."},{"name":"Interpolation - Multiple Calls","data":{"lambda":{"php":"global $calls; return ++$calls;","__tag__":"code","perl":"sub { no strict; $calls += 1 }","python":"lambda: globals().update(calls=globals().get(\"calls\",0)+1) or calls","ruby":"proc { $calls ||= 0; $calls += 1 }","js":"function() { return (g=(function(){return this})()).calls=(g.calls||0)+1 }"}},"expected":"1 == 2 == 3","template":"{{lambda}} == {{{lambda}}} == {{lambda}}","desc":"Interpolated lambdas should not be cached."},{"name":"Escaping","data":{"lambda":{"php":"return \">\";","__tag__":"code","perl":"sub { \">\" }","python":"lambda: \">\"","ruby":"proc { \">\" }","js":"function() { return \">\" }"}},"expected":"<&gt;>","template":"<{{lambda}}{{{lambda}}}","desc":"Lambda results should be appropriately escaped."},{"name":"Section","data":{"x":"Error!","lambda":{"php":"return ($text == \"{{x}}\") ? \"yes\" : \"no\";","__tag__":"code","perl":"sub { $_[0] eq \"{{x}}\" ? \"yes\" : \"no\" }","python":"lambda text: text == \"{{x}}\" and \"yes\" or \"no\"","ruby":"proc { |text| text == \"{{x}}\" ? \"yes\" : \"no\" }","js":"function(txt) { return (txt == \"{{x}}\" ? \"yes\" : \"no\") }"}},"expected":"<yes>","template":"<{{#lambda}}{{x}}{{/lambda}}>","desc":"Lambdas used for sections should receive the raw section string."},{"name":"Section - Expansion","data":{"planet":"Earth","lambda":{"php":"return $text . \"{{planet}}\" . $text;","__tag__":"code","perl":"sub { $_[0] . \"{{planet}}\" . $_[0] }","python":"lambda text: \"%s{{planet}}%s\" % (text, text)","ruby":"proc { |text| \"#{text}{{planet}}#{text}\" }","js":"function(txt) { return txt + \"{{planet}}\" + txt }"}},"expected":"<-Earth->","template":"<{{#lambda}}-{{/lambda}}>","desc":"Lambdas used for sections should have their results parsed."},{"name":"Section - Alternate Delimiters","data":{"planet":"Earth","lambda":{"php":"return $text . \"{{planet}} => |planet|\" . $text;","__tag__":"code","perl":"sub { $_[0] . \"{{planet}} => |planet|\" . $_[0] }","python":"lambda text: \"%s{{planet}} => |planet|%s\" % (text, text)","ruby":"proc { |text| \"#{text}{{planet}} => |planet|#{text}\" }","js":"function(txt) { return txt + \"{{planet}} => |planet|\" + txt }"}},"expected":"<-{{planet}} => Earth->","template":"{{= | | =}}<|#lambda|-|/lambda|>","desc":"Lambdas used for sections should parse with the current delimiters."},{"name":"Section - Multiple Calls","data":{"lambda":{"php":"return \"__\" . $text . \"__\";","__tag__":"code","perl":"sub { \"__\" . $_[0] . \"__\" }","python":"lambda text: \"__%s__\" % (text)","ruby":"proc { |text| \"__#{text}__\" }","js":"function(txt) { return \"__\" + txt + \"__\" }"}},"expected":"__FILE__ != __LINE__","template":"{{#lambda}}FILE{{/lambda}} != {{#lambda}}LINE{{/lambda}}","desc":"Lambdas used for sections should not be cached."},{"name":"Inverted Section","data":{"static":"static","lambda":{"php":"return false;","__tag__":"code","perl":"sub { 0 }","python":"lambda text: 0","ruby":"proc { |text| false }","js":"function(txt) { return false }"}},"expected":"<>","template":"<{{^lambda}}{{static}}{{/lambda}}>","desc":"Lambdas used for inverted sections should be considered truthy."}]}
\ No newline at end of file