Fix unneeded-trait-implementations-title test

Munksgaard · Munksgaard · commit 5f8dc0ddf472 · 2018-10-05T19:13:37.000+02:00
The `@!has` command does not support specifying just a PATH and an XPATH. That means that the previous test searched for the literal string `//h2[@id="implementations"]` within the generated output, which obviously didn't exist. Even after adding a trait implementation, the test still passed. The correct way to check for the existence of a DOM element with the id `implementations` is to use the `@count` keyword.
diff --git a/src/test/rustdoc/unneeded-trait-implementations-title.rs b/src/test/rustdoc/unneeded-trait-implementations-title.rs
@@ -12,4 +12,4 @@
 
 pub struct Bar;
 
-// @!has foo/struct.Bar.html '//*[@id="implementations"]'
+// @count foo/struct.Bar.html '//*[@id="implementations"]' 0

Original file line number	Diff line number	Diff line change
`@@ -12,4 +12,4 @@`
`12`	`12`
`13`	`13`	`pub struct Bar;`
`14`	`14`
`15`		`-// @!has foo/struct.Bar.html '//*[@id="implementations"]'`
	`15`	`+// @count foo/struct.Bar.html '//*[@id="implementations"]' 0`