Dynamically interpret semver expression in local dirs package.json

test/fast/Unit tests/nvm_string_equals_regexp

@@ -0,0 +1,42 @@
+#!/bin/sh
+
+die () { printf "$@" ; exit 1; }
+
+\. ../../../nvm.sh
+
+valid_semver_regexp='^( ?(<|<=|>|>=|=|~|\^)?([0-9]+|x)\.([0-9]+|x)\.([0-9]+|x))+$'
+
+# POSITIVE TEST CASES
+
+# STRING:REGEXP
+test_cases="1.2.3:$valid_semver_regexp
+11.22.33:$valid_semver_regexp"
+
+while [ -n "$test_cases" ]; do
+  LINE=$(echo "$test_cases" | head -n1)
+  STRING=$(echo "$LINE" | awk -F: '{ print $1 }')
+  REGEXP=$(echo "$LINE" | awk -F: '{ print $2 }')
+  [ -n "$REGEXP" ] \
+    && [ -n "$STRING" ] \
+    && nvm_string_contains_regexp "$STRING" "$REGEXP" \
+    || die "nvm_string_contains_regexp POSITIVE test case failed. REGEXP: '$REGEXP'. STRING: '$STRING'.\n"
+  test_cases=$(echo "$test_cases" | tail -n +2)
+done
+
+# NEGATIVE TEST CASES
+
+# STRING:REGEXP
+test_cases="1.2.a:$valid_semver_regexp
+:$valid_semver_regexp
+11.22.a:$valid_semver_regexp"
+
+while [ -n "$test_cases" ]; do
+  LINE=$(echo "$test_cases" | head -n1)
+  STRING=$(echo "$LINE" | awk -F: '{ print $1 }')
+  REGEXP=$(echo "$LINE" | awk -F: '{ print $2 }')
+  [ -n "$REGEXP" ] \
+    && ! nvm_string_contains_regexp "$STRING" "$REGEXP" \
+    || die "nvm_string_contains_regexp NEGATIVE test case failed. REGEXP: '$REGEXP'. STRING: '$STRING'.\n"
+  test_cases=$(echo "$test_cases" | tail -n +2)
+done
+exit 0