add basic tests for FLines queries

Author: alexrford

ql/test/query-tests/metrics/FLines/FLines.expected

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+| FLines.rb:0:0:0:0 | FLines.rb | 25 |

ql/test/query-tests/metrics/FLines/FLines.qlref

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+queries/metrics/FLines.ql

ql/test/query-tests/metrics/FLines/FLines.rb

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+# frozen_string_literal: true
+
+class FLinesTest
+
+    def foo
+      # This is a comment
+      # and another
+
+      some_string = <<-ESCAPE
+hello world
+multiple
+lines
+
+how many lines of code in this heredoc?
+# 9 lines total
+
+ESCAPE
+
+      p some_string
+
+      7
+    end
+
+
+end

ql/test/query-tests/metrics/FLinesOfCode/FLinesOfCode.expected

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+| FLinesOfCode.rb:0:0:0:0 | FLinesOfCode.rb | 15 |

ql/test/query-tests/metrics/FLinesOfCode/FLinesOfCode.qlref

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+queries/metrics/FLinesOfCode.ql

ql/test/query-tests/metrics/FLinesOfCode/FLinesOfCode.rb

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+# frozen_string_literal: true
+
+class FLinesTest
+
+    def foo
+      # This is a comment
+      # and another
+
+      some_string = <<-ESCAPE
+hello world
+multiple
+lines
+
+how many lines of code in this heredoc?
+# 9 lines total
+
+ESCAPE
+
+      p some_string
+
+      7
+    end
+
+
+end

ql/test/query-tests/metrics/FLinesOfComments/FLinesOfComments.expected

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+| FLinesOfComments.rb:0:0:0:0 | FLinesOfComments.rb | 3 |

ql/test/query-tests/metrics/FLinesOfComments/FLinesOfComments.qlref

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+queries/metrics/FLinesOfComments.ql

ql/test/query-tests/metrics/FLinesOfComments/FLinesOfComments.rb

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+# frozen_string_literal: true
+
+class FLinesTest
+
+    def foo
+      # This is a comment
+      # and another
+
+      some_string = <<-ESCAPE
+hello world
+multiple
+lines
+
+how many lines of code in this heredoc?
+# 9 lines total
+
+ESCAPE
+
+      p some_string
+
+      7
+    end
+
+
+end