Ruby: Add ActiveSupport extensions

ruby/ql/test/library-tests/frameworks/active_support/ActiveSupportDataFlow.ql

@@ -4,6 +4,7 @@
 
 import codeql.ruby.AST
 import TestUtilities.InlineFlowTest
+import codeql.ruby.Frameworks
 import PathGraph
 
 from DataFlow::PathNode source, DataFlow::PathNode sink, DefaultValueFlowConf conf

ruby/ql/test/library-tests/frameworks/active_support/hash_extensions.rb

@@ -0,0 +1,76 @@
+def m_deep_merge
+    h1 = { a: source "a" }
+    h2 = { b: source "b" }
+    x = h1.deep_merge(h2)
+
+    sink x[:a] # $ hasValueFlow=a
+    sink x[:b] # $ hasValueFlow=b
+end
+
+def m_deep_merge!
+    h1 = { a: source "a" }
+    h2 = { b: source "b" }
+    x = h1.deep_merge!(h2)
+
+    sink x[:a] # $ hasValueFlow=a
+    sink x[:b] # $ hasValueFlow=b
+
+    sink h1[:a] # $ hasValueFlow=a
+    sink h1[:b] # $ hasValueFlow=b
+
+    sink h2[:a]
+    sink h2[:b] # $ hasValueFlow=b
+end
+
+def m_stringify_keys
+    h = { a: source "a" }
+    x = h.stringify_keys
+    sink x[:a] # $hasValueFlow=a
+end
+
+def m_to_options
+    h = { a: taint "a" }
+    x = h.to_options
+    sink x[:a] # $hasTaintFlow=a
+end
+
+def m_symbolize_keys
+    h = { a: taint "a" }
+    x = h.symbolize_keys
+    sink x[:a] # $hasTaintFlow=a
+end
+
+def m_deep_stringify_keys
+    h = { a: taint "a" }
+    x = h.deep_stringify_keys
+    sink x[:a] # $hasTaintFlow=a
+end
+
+def m_deep_symbolize_keys
+    h = { a: taint "a" }
+    x = h.deep_symbolize_keys
+    sink x[:a] # $hasTaintFlow=a
+end
+
+def m_with_indifferent_access
+    h = { a: taint "a" }
+    x = h.with_indifferent_access
+    sink x[:a] # $hasTaintFlow=a
+end
+
+def m_extract!(x)
+    h = { a: taint "a", b: taint "b", c: "c", d: taint "d" }
+    x = h.extract!(:a, x, :b)
+
+    sink h[:a]
+    sink h[:b]
+    sink h[:c]
+    sink h[:d] # $ hasValueFlow=d
+
+    sink x[:a] # $ hasValueFlow=a
+    sink x[:b] # $ hasValueFlow=b
+    sink x[:c]
+    sink x[:d]
+end
+
+m_extract!(:c)