Added test case for base theme SVN functionality

Unit tests for #1612, #1613.

test/fixtures/svn/broken/svn

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+exit 72

test/fixtures/svn/working/svn

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+exit 0

test/themes/base.theme.svn.bats

@@ -0,0 +1,81 @@
+#!/usr/bin/env bats
+
+load ../test_helper
+load ../../lib/composure
+
+cite _about _param _example _group _author _version
+
+load ../../lib/helpers
+load ../../themes/base.theme
+
+function local_setup {
+  setup_test_fixture
+
+  # Copy the test fixture to the Bash-it folder
+  if command -v rsync &> /dev/null
+  then
+    rsync -a "$BASH_IT/test/fixtures/bash_it/" "$BASH_IT/"
+  else
+    find "$BASH_IT/test/fixtures/bash_it" \
+      -mindepth 1 -maxdepth 1 \
+      -exec cp -r {} "$BASH_IT/" \;
+  fi
+}
+
+setup_repo() {
+  upstream="$(mktemp -d)"
+  pushd "$upstream" > /dev/null
+  # Create a dummy SVN folder - this will not work with an actual `svn` command,
+  # but will be enough to trigger the SVN check in the base theme.
+  mkdir .svn
+
+  echo "$upstream"
+}
+
+setup_svn_path() {
+  local svn_path="$1"
+
+  # Make sure that the requested SVN script is available
+  assert_file_exist "$svn_path/svn"
+
+  export OLD_PATH="$PATH"
+  # Make sure that the requested SVN script is on the path
+  export PATH="$svn_path:/usr/bin:/bin:/usr/sbin"
+}
+
+reset_svn_path() {
+  export PATH="$OLD_PATH"
+  unset OLD_PATH
+}
+
+@test 'themes base: SVN: detect SVN repo' {
+  repo="$(setup_repo)"
+  pushd "$repo"
+
+  setup_svn_path "$BASH_IT/test/fixtures/svn/working"
+
+  # Load the base theme again so that the working SVN script is detected
+  load ../../themes/base.theme
+
+  scm
+  # Make sure that the SVN command is used
+  assert_equal "$SCM" "$SCM_SVN"
+
+  reset_svn_path
+}
+
+@test 'themes base: SVN: ignore SVN repo when using broken SVN command' {
+  repo="$(setup_repo)"
+  pushd "$repo"
+
+  setup_svn_path "$BASH_IT/test/fixtures/svn/broken"
+
+  # Load the base theme again so that the broken SVN script is detected
+  load ../../themes/base.theme
+
+  scm
+  # Make sure that the SVN command is not used
+  assert_equal "$SCM" "$SCM_NONE"
+
+  reset_svn_path
+}