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File 5791-dialyzer-Add-test-for-extra_return-and-missing_retur.patch of Package erlang (Revision b4f72044e1af8cfe32130ab849a401a1)

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From 122aaa23f6317d02b4bf55910cf268ffa7ac96bc Mon Sep 17 00:00:00 2001
From: Gonzalo Bella <gonzalobfmp@gmail.com>
Date: Thu, 9 Jun 2022 08:57:21 +0100
Subject: [PATCH 1/3] dialyzer: Add test for extra_return and missing_return

These warnings were part of `overspecs` and `underspecs` but were
split in https://github.com/erlang/otp/pull/5214 so they are probably
already tested. But for convenience, I decided to create two suites for
testing each of them so we have one for each warning.
---
 .../test/extra_return_SUITE_data/dialyzer_options    |  1 +
 .../extra_return_SUITE_data/results/extra_return     |  2 ++
 .../extra_return_SUITE_data/src/extra_return.erl     | 12 ++++++++++++
 .../test/missing_return_SUITE_data/dialyzer_options  |  1 +
 .../missing_return_SUITE_data/results/missing_return |  2 ++
 .../missing_return_SUITE_data/src/missing_return.erl | 12 ++++++++++++
 6 files changed, 30 insertions(+)
 create mode 100644 lib/dialyzer/test/extra_return_SUITE_data/dialyzer_options
 create mode 100644 lib/dialyzer/test/extra_return_SUITE_data/results/extra_return
 create mode 100644 lib/dialyzer/test/extra_return_SUITE_data/src/extra_return.erl
 create mode 100644 lib/dialyzer/test/missing_return_SUITE_data/dialyzer_options
 create mode 100644 lib/dialyzer/test/missing_return_SUITE_data/results/missing_return
 create mode 100644 lib/dialyzer/test/missing_return_SUITE_data/src/missing_return.erl

diff --git a/lib/dialyzer/test/extra_return_SUITE_data/dialyzer_options b/lib/dialyzer/test/extra_return_SUITE_data/dialyzer_options
new file mode 100644
index 0000000000..c83f8d286d
--- /dev/null
+++ b/lib/dialyzer/test/extra_return_SUITE_data/dialyzer_options
@@ -0,0 +1 @@
+{dialyzer_options, [{indent_opt, false}, {warnings, [extra_return]}]}.
diff --git a/lib/dialyzer/test/extra_return_SUITE_data/results/extra_return b/lib/dialyzer/test/extra_return_SUITE_data/results/extra_return
new file mode 100644
index 0000000000..63895a231d
--- /dev/null
+++ b/lib/dialyzer/test/extra_return_SUITE_data/results/extra_return
@@ -0,0 +1,2 @@
+
+extra_return.erl:7:2: The specification for extra_return:t1/0 states that the function might also return 'other' but the inferred return is boolean()
diff --git a/lib/dialyzer/test/extra_return_SUITE_data/src/extra_return.erl b/lib/dialyzer/test/extra_return_SUITE_data/src/extra_return.erl
new file mode 100644
index 0000000000..7c51512145
--- /dev/null
+++ b/lib/dialyzer/test/extra_return_SUITE_data/src/extra_return.erl
@@ -0,0 +1,12 @@
+-module(extra_return).
+
+-export([t1/0]).
+
+
+% Should warn about having `undefined` as return value when it is not returned by the function
+-spec t1() -> true | false | 'other'.
+t1() ->
+    case rand:uniform(2) of
+        1 -> true;
+        2 -> false
+    end.
diff --git a/lib/dialyzer/test/missing_return_SUITE_data/dialyzer_options b/lib/dialyzer/test/missing_return_SUITE_data/dialyzer_options
new file mode 100644
index 0000000000..d7ee920ade
--- /dev/null
+++ b/lib/dialyzer/test/missing_return_SUITE_data/dialyzer_options
@@ -0,0 +1 @@
+{dialyzer_options, [{indent_opt, false}, {warnings, [missing_return]}]}.
diff --git a/lib/dialyzer/test/missing_return_SUITE_data/results/missing_return b/lib/dialyzer/test/missing_return_SUITE_data/results/missing_return
new file mode 100644
index 0000000000..3f0464b680
--- /dev/null
+++ b/lib/dialyzer/test/missing_return_SUITE_data/results/missing_return
@@ -0,0 +1,2 @@
+
+missing_return.erl:7:2: The success typing for missing_return:t1/0 implies that the function might also return 'false' but the specification return is 'true'
diff --git a/lib/dialyzer/test/missing_return_SUITE_data/src/missing_return.erl b/lib/dialyzer/test/missing_return_SUITE_data/src/missing_return.erl
new file mode 100644
index 0000000000..1f0dfe6176
--- /dev/null
+++ b/lib/dialyzer/test/missing_return_SUITE_data/src/missing_return.erl
@@ -0,0 +1,12 @@
+-module(missing_return).
+
+-export([t1/0]).
+
+
+% Should warn about only having true when also false is returned
+-spec t1() -> true.
+t1() ->
+    case rand:uniform(2) of
+        1 -> true;
+        2 -> false
+    end.
-- 
2.35.3

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File 5791-dialyzer-Add-test-for-extra_return-and-missing_retur.patch of Package erlang (Revision b4f72044e1af8cfe32130ab849a401a1)

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