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authorbors <bors@rust-lang.org>2019-08-31 20:10:20 +0000
committerbors <bors@rust-lang.org>2019-08-31 20:10:20 +0000
commit59cc53e6e708e9b9e86822c1b4d69f28f6c45eae (patch)
tree5e6317bc94dc6a4871889566a732069c47aae95b /src/test/rustdoc-ui
parentfba38ac27e2ade309f4c2504a6d6cd3556972a28 (diff)
parent0ec2e9fcebd18d98a32884786e1c4bbaf3db1ce0 (diff)
downloadrust-59cc53e6e708e9b9e86822c1b4d69f28f6c45eae.tar.gz
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Auto merge of #63703 - tommilligan:warn-empty-doctest, r=ollie27
rustdoc: warn on empty doc test

Closes #60319.

A doc test that only contains whitespace should result in a warning.

This PR adds detection of empty doc tests to `check-code-block-syntax`, as having an invalid doc test is mutually exclusive with an empty doc test.
Diffstat (limited to 'src/test/rustdoc-ui')
-rw-r--r--src/test/rustdoc-ui/invalid-syntax.rs10
-rw-r--r--src/test/rustdoc-ui/invalid-syntax.stderr22
2 files changed, 32 insertions, 0 deletions
diff --git a/src/test/rustdoc-ui/invalid-syntax.rs b/src/test/rustdoc-ui/invalid-syntax.rs
index 2b02d47d4b8..3ef66e273d0 100644
--- a/src/test/rustdoc-ui/invalid-syntax.rs
+++ b/src/test/rustdoc-ui/invalid-syntax.rs
@@ -64,3 +64,13 @@ pub fn blargh() {}
 /// \_
 #[doc = "```"]
 pub fn crazy_attrs() {}
+
+/// ```rust
+/// ```
+pub fn empty_rust() {}
+
+/// ```
+///
+///
+/// ```
+pub fn empty_rust_with_whitespace() {}
diff --git a/src/test/rustdoc-ui/invalid-syntax.stderr b/src/test/rustdoc-ui/invalid-syntax.stderr
index 3bebbecb9df..36209e29277 100644
--- a/src/test/rustdoc-ui/invalid-syntax.stderr
+++ b/src/test/rustdoc-ui/invalid-syntax.stderr
@@ -179,6 +179,28 @@ LL | | #[doc = "```"]
    |
    = help: mark blocks that do not contain Rust code as text: ```text
 
+warning: Rust code block is empty
+  --> $DIR/invalid-syntax.rs:68:5
+   |
+LL |   /// ```rust
+   |  _____^
+LL | | /// ```
+   | |_______^
+
+warning: Rust code block is empty
+  --> $DIR/invalid-syntax.rs:72:5
+   |
+LL |   /// ```
+   |  _____^
+LL | | ///
+LL | | ///
+LL | | /// ```
+   | |_______^
+help: mark blocks that do not contain Rust code as text
+   |
+LL | /// ```text
+   |     ^^^^^^^
+
 error: unknown start of token: \
  --> <rustdoc-highlighting>:1:1
   |