1 files changed, 79 insertions, 0 deletions
diff --git a/Tests/RunCMake/list/POP_FRONT.cmake b/Tests/RunCMake/list/POP_FRONT.cmake
new file mode 100644
index 0000000..a2f8f3c
--- /dev/null
+++ b/Tests/RunCMake/list/POP_FRONT.cmake
@@ -0,0 +1,79 @@
+cmake_policy(SET CMP0054 NEW)
+
+function(assert_expected_list_len list_var expected_size)
+    list(LENGTH ${list_var} _size)
+    if(NOT _size EQUAL ${expected_size})
+        message(FATAL_ERROR "list size expected to be `${expected_size}`, got `${_size}` instead")
+    endif()
+endfunction()
+
+# Pop from undefined list
+list(POP_FRONT test)
+if(DEFINED test)
+    message(FATAL_ERROR "`test` expected to be undefined")
+endif()
+
+# Pop from empty list
+set(test)
+list(POP_FRONT test)
+if(DEFINED test)
+    message(FATAL_ERROR "`test` expected to be undefined")
+endif()
+
+# Default pop from 1-item list
+list(APPEND test one)
+list(POP_FRONT test)
+assert_expected_list_len(test 0)
+
+# Pop from 1-item list to var
+list(APPEND test one)
+list(POP_FRONT test one)
+assert_expected_list_len(test 0)
+if(NOT DEFINED one)
+    message(FATAL_ERROR "`one` expected to be defined")
+endif()
+if(NOT one STREQUAL "one")
+    message(FATAL_ERROR "`one` has unexpected value `${one}`")
+endif()
+
+unset(one)
+unset(two)
+
+# Pop from 1-item list to vars
+list(APPEND test one)
+list(POP_FRONT test one two)
+assert_expected_list_len(test 0)
+if(NOT DEFINED one)
+    message(FATAL_ERROR "`one` expected to be defined")
+endif()
+if(NOT one STREQUAL "one")
+    message(FATAL_ERROR "`one` has unexpected value `${one}`")
+endif()
+if(DEFINED two)
+    message(FATAL_ERROR "`two` expected to be undefined")
+endif()
+
+unset(one)
+unset(two)
+
+# Default pop from 2-item list
+list(APPEND test one two)
+list(POP_FRONT test)
+assert_expected_list_len(test 1)
+if(NOT test STREQUAL "two")
+    message(FATAL_ERROR "`test` has unexpected value `${test}`")
+endif()
+
+# Pop from 2-item list
+list(PREPEND test one)
+list(POP_FRONT test one)
+assert_expected_list_len(test 1)
+if(NOT DEFINED one)
+    message(FATAL_ERROR "`one` expected to be defined")
+endif()
+if(NOT one STREQUAL "one")
+    message(FATAL_ERROR "`one` has unexpected value `${one}`")
+endif()
+if(NOT test STREQUAL "two")
+    message(FATAL_ERROR "`test` has unexpected value `${test}`")
+endif()