add example file testing GCC command line interface

examples/CMDTEST_gcc.rb

@@ -0,0 +1,226 @@
+#----------------------------------------------------------------------
+# CMDTEST_gcc.rb
+#----------------------------------------------------------------------
+# Copyright 2010 Johan Holmberg.
+#----------------------------------------------------------------------
+# This file is part of "cmdtest".
+#
+# "cmdtest" is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# "cmdtest" is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with "cmdtest".  If not, see <http://www.gnu.org/licenses/>.
+#----------------------------------------------------------------------
+
+#
+# Example of testing GCC command line interface using "cmdtest".
+#
+
+class CMDTEST_gcc < Cmdtest::Testcase
+
+  #----------------------------------------
+
+  def test_no_arguments
+    cmd "gcc" do
+      stderr_equal [
+        /^.*gcc.*: no input files/,
+      ]
+      exit_nonzero
+    end
+  end
+
+  #----------------------------------------
+
+  def test_nonexisting_input
+    cmd "gcc -c non-existing.c" do
+      stderr_equal [
+        /^.*gcc.*: non-existing.c: No such file/,
+        /^.*gcc.*: no input files/,
+      ]
+      exit_nonzero
+    end
+
+    cmd "gcc non-existing.c" do
+      stderr_equal [
+        /^.*gcc.*: non-existing.c: No such file/,
+        /^.*gcc.*: no input files/,
+      ]
+      exit_nonzero
+    end
+
+    cmd "gcc non-existing.o" do
+      stderr_equal [
+        /^.*gcc.*: non-existing.o: No such file/,
+        /^.*gcc.*: no input files/,
+      ]
+      exit_nonzero
+    end
+  end
+
+  #----------------------------------------
+
+  def test_compile_only
+
+    create_file "alpha.c", "int add_alpha(int x, int y) { return x+y; }"
+
+    cmd "gcc -c alpha.c" do
+      created_files "alpha.o"
+    end
+
+    create_file "beta.c", "int add_beta(int x, int y) { return x+y; }"
+    create_file "gamma.c", "int add_gamma(int x, int y) { return x+y; }"
+
+    cmd "gcc -c beta.c gamma.c" do
+      created_files "beta.o", "gamma.o"
+    end
+
+    cmd "gcc alpha.c -c" do
+      written_files "alpha.o"
+    end
+
+    cmd "gcc beta.c -c gamma.c" do
+      written_files "beta.o", "gamma.o"
+    end
+
+    cmd "gcc -c alpha.o" do
+      stderr_equal [
+        /^.*gcc.*: alpha.o: linker input file unused because linking not done/,
+      ]
+    end
+
+    cmd "gcc -c alpha.o beta.o" do
+      stderr_equal [
+        /^.*gcc.*: alpha.o: linker input file unused because linking not done/,
+        /^.*gcc.*: beta.o: linker input file unused because linking not done/,
+      ]
+    end
+  end
+
+  #----------------------------------------
+
+  def test_compile_output
+
+    create_file "alpha.c", "int add_alpha(int x, int y) { return x+y; }"
+
+    cmd "gcc -c alpha.c -o alpha.o" do
+      created_files "alpha.o"
+    end
+
+    cmd "gcc -c alpha.c -o beta.o" do
+      created_files "beta.o"
+    end
+
+    cmd "gcc -o gamma.o -c alpha.c" do
+      created_files "gamma.o"
+    end
+  end
+
+  #----------------------------------------
+
+  def test_link
+
+    create_file "alpha.c", "int main() { return 17; }"
+
+    cmd "gcc -c alpha.c" do
+      created_files "alpha.o"
+    end
+
+    cmd "gcc alpha.o" do
+      created_files "a.out"
+    end
+
+    cmd "gcc alpha.o -o beta" do
+      created_files "beta"
+    end
+
+    cmd "gcc -o gamma alpha.o" do
+      created_files "gamma"
+    end
+
+  end
+
+  #----------------------------------------
+
+  def test_link_2
+
+    create_file "alpha.c", "extern int beta ; int main() { return beta; }"
+    create_file "beta.c", "int beta = 17;"
+
+    cmd "gcc -c alpha.c beta.c" do
+      created_files "alpha.o", "beta.o"
+    end
+
+    cmd "gcc alpha.o beta.o" do
+      created_files "a.out"
+    end
+
+    cmd "gcc alpha.o beta.o -o beta" do
+      created_files "beta"
+    end
+
+    cmd "gcc -o gamma alpha.o beta.o" do
+      created_files "gamma"
+    end
+
+  end
+
+  #----------------------------------------
+
+  def test_compile_and_link
+
+    create_file "alpha.c", "extern int beta ; int main() { return beta; }"
+    create_file "beta.c", "int beta = 17;"
+
+    cmd "gcc alpha.c beta.c" do
+      created_files "a.out"
+    end
+
+    cmd "gcc alpha.c beta.c -o gamma" do
+      created_files "gamma"
+    end
+
+    cmd "gcc -o delta alpha.c beta.c" do
+      created_files "delta"
+    end
+
+    cmd "gcc -c alpha.c" do
+      created_files "alpha.o"
+    end
+
+    cmd "gcc -o epsilon alpha.o beta.c" do
+      created_files "epsilon"
+    end
+
+  end
+
+  #----------------------------------------
+
+  def test_preprocess
+
+    create_file "alpha.c", [
+      "#define VALUE 17",
+      "int variable = VALUE;",
+    ]
+
+    cmd "gcc -E alpha.c" do
+      stdout_equal /"alpha.c"/
+      stdout_equal /^int variable = 17;/
+    end
+
+    cmd "gcc -E alpha.c -o alpha.preprocessed" do
+      created_files "alpha.preprocessed"
+      file_equal "alpha.preprocessed", /"alpha.c"/
+      file_equal "alpha.preprocessed", /^int variable = 17;/
+    end
+  end
+
+  #----------------------------------------
+
+end