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docs: check commands: CHECK-EMPTY: initial description #91

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Jan 26, 2020
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docs: check commands: CHECK-EMPTY: initial description #91

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34 changes: 32 additions & 2 deletions docs/05-check-commands.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -122,7 +122,7 @@ Check file ``CHECK-NEXT.check``:

$ echo -e "String1\nString2" | filecheck CHECK-NEXT.check
...filecheck
$ echo ?0
$ echo $?
0

.. code-block:: bash
Expand All @@ -145,4 +145,34 @@ Check file ``CHECK-NEXT.check``:
CHECK-EMPTY
-----------

...
``CHECK-EMPTY`` command is used to match empty lines.

Consider the following check file:

.. code-block:: text

CHECK: String1
CHECK-EMPTY:
CHECK: String2

In the following example, there is an empty line so the test will pass:

.. code-block:: bash

echo -e "String1\n\nString2" | filecheck CHECK-EMPTY.check
...filecheck
$ echo $?
0

If the empty line is removed, the test will fail:

echo -e "String1\nString2" | filecheck CHECK-EMPTY.check
...filecheck
...CHECK-EMPTY.check:2:13: error: CHECK-EMPTY: expected string not found in input
CHECK-EMPTY:
^
<stdin>:2:1: note: scanning from here
String2
^
$ echo $?
1
3 changes: 3 additions & 0 deletions tests/integration/tests/examples/check-commands/CHECK-EMPTY/Failure/CHECK-EMPTY.check
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@@ -0,0 +1,3 @@
CHECK: String1
CHECK-EMPTY:
CHECK: String2
9 changes: 9 additions & 0 deletions tests/integration/tests/examples/check-commands/CHECK-EMPTY/Failure/CHECK-EMPTY.itest-py
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@@ -0,0 +1,9 @@
; RUN: echo -e "String1\nString2" | (%FILECHECK_EXEC %S/CHECK-EMPTY.check 2>&1; test $? = 1) | %FILECHECK_EXEC %s
; CHECK: {{^.*}}FileCheck{{(\.py)?$}}
; CHECK: {{^.*}}CHECK-EMPTY.check:2:13: error: CHECK-EMPTY: expected string not found in input
; CHECK: CHECK-EMPTY:
; CHECK: ^
; CHECK: <stdin>:2:1: note: scanning from here
; CHECK: String2
; CHECK: ^
; CHECK-EMPTY:
3 changes: 3 additions & 0 deletions tests/integration/tests/examples/check-commands/CHECK-EMPTY/Success/CHECK-EMPTY.check
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@@ -0,0 +1,3 @@
CHECK: String1
CHECK-EMPTY:
CHECK: String2
3 changes: 3 additions & 0 deletions tests/integration/tests/examples/check-commands/CHECK-EMPTY/Success/CHECK-EMPTY.itest
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; RUN: echo -e "String1\n\nString2" | %FILECHECK_EXEC %S/CHECK-EMPTY.check | %FILECHECK_EXEC %s
; CHECK: {{^.*}}FileCheck{{(\.py)?$}}
; CHECK-EMPTY: