Allow tests to ignore individual test modes

Normally, each test in `tests/coverage` is automatically run in both
`coverage-map` mode and `coverage-run` mode.

This new family of directives allows an individual test to specify that it
should not be run in a particular mode.

4 files changed, 18 insertions, 0 deletions

diff --git a/tests/coverage/ignore_map.coverage b/tests/coverage/ignore_map.coverage
new file mode 100644
index 00000000000..04bcb5bec6e
--- /dev/null
+++ b/tests/coverage/ignore_map.coverage
@@ -0,0 +1,4 @@
+   LL|       |// ignore-mode-coverage-map
+   LL|       |
+   LL|      1|fn main() {}
+
diff --git a/tests/coverage/ignore_map.rs b/tests/coverage/ignore_map.rs
new file mode 100644
index 00000000000..71b82e8fc9d
--- /dev/null
+++ b/tests/coverage/ignore_map.rs
@@ -0,0 +1,3 @@
+// ignore-mode-coverage-map
+
+fn main() {}
diff --git a/tests/coverage/ignore_run.cov-map b/tests/coverage/ignore_run.cov-map
new file mode 100644
index 00000000000..9865efae0a1
--- /dev/null
+++ b/tests/coverage/ignore_run.cov-map
@@ -0,0 +1,8 @@
+Function name: ignore_run::main
+Raw bytes (9): 0x[01, 01, 00, 01, 01, 03, 01, 00, 0d]
+Number of files: 1
+- file 0 => global file 1
+Number of expressions: 0
+Number of file 0 mappings: 1
+- Code(Counter(0)) at (prev + 3, 1) to (start + 0, 13)
+
diff --git a/tests/coverage/ignore_run.rs b/tests/coverage/ignore_run.rs
new file mode 100644
index 00000000000..87108867a05
--- /dev/null
+++ b/tests/coverage/ignore_run.rs
@@ -0,0 +1,3 @@
+// ignore-mode-coverage-run
+
+fn main() {}