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Diffstat (limited to 'activerecord/test/cases/relation/where_clause_test.rb')
| -rw-r--r-- | activerecord/test/cases/relation/where_clause_test.rb | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/activerecord/test/cases/relation/where_clause_test.rb b/activerecord/test/cases/relation/where_clause_test.rb new file mode 100644 index 0000000000..8703d238a0 --- /dev/null +++ b/activerecord/test/cases/relation/where_clause_test.rb @@ -0,0 +1,241 @@ +# frozen_string_literal: true + +require "cases/helper" + +class ActiveRecord::Relation + class WhereClauseTest < ActiveRecord::TestCase + test "+ combines two where clauses" do + first_clause = WhereClause.new([table["id"].eq(bind_param(1))]) + second_clause = WhereClause.new([table["name"].eq(bind_param("Sean"))]) + combined = WhereClause.new( + [table["id"].eq(bind_param(1)), table["name"].eq(bind_param("Sean"))], + ) + + assert_equal combined, first_clause + second_clause + end + + test "+ is associative, but not commutative" do + a = WhereClause.new(["a"]) + b = WhereClause.new(["b"]) + c = WhereClause.new(["c"]) + + assert_equal a + (b + c), (a + b) + c + assert_not_equal a + b, b + a + end + + test "an empty where clause is the identity value for +" do + clause = WhereClause.new([table["id"].eq(bind_param(1))]) + + assert_equal clause, clause + WhereClause.empty + end + + test "merge combines two where clauses" do + a = WhereClause.new([table["id"].eq(1)]) + b = WhereClause.new([table["name"].eq("Sean")]) + expected = WhereClause.new([table["id"].eq(1), table["name"].eq("Sean")]) + + assert_equal expected, a.merge(b) + end + + test "merge keeps the right side, when two equality clauses reference the same column" do + a = WhereClause.new([table["id"].eq(1), table["name"].eq("Sean")]) + b = WhereClause.new([table["name"].eq("Jim")]) + expected = WhereClause.new([table["id"].eq(1), table["name"].eq("Jim")]) + + assert_equal expected, a.merge(b) + end + + test "merge removes bind parameters matching overlapping equality clauses" do + a = WhereClause.new( + [table["id"].eq(bind_param(1)), table["name"].eq(bind_param("Sean"))], + ) + b = WhereClause.new( + [table["name"].eq(bind_param("Jim"))], + ) + expected = WhereClause.new( + [table["id"].eq(bind_param(1)), table["name"].eq(bind_param("Jim"))], + ) + + assert_equal expected, a.merge(b) + end + + test "merge allows for columns with the same name from different tables" do + table2 = Arel::Table.new("table2") + a = WhereClause.new( + [table["id"].eq(bind_param(1)), table2["id"].eq(bind_param(2))], + ) + b = WhereClause.new( + [table["id"].eq(bind_param(3))], + ) + expected = WhereClause.new( + [table2["id"].eq(bind_param(2)), table["id"].eq(bind_param(3))], + ) + + assert_equal expected, a.merge(b) + end + + test "a clause knows if it is empty" do + assert_empty WhereClause.empty + assert_not_empty WhereClause.new(["anything"]) + end + + test "invert cannot handle nil" do + where_clause = WhereClause.new([nil]) + + assert_raises ArgumentError do + where_clause.invert + end + end + + test "invert replaces each part of the predicate with its inverse" do + random_object = Object.new + original = WhereClause.new([ + table["id"].in([1, 2, 3]), + table["id"].eq(1), + "sql literal", + random_object + ]) + expected = WhereClause.new([ + table["id"].not_in([1, 2, 3]), + table["id"].not_eq(1), + Arel::Nodes::Not.new(Arel::Nodes::SqlLiteral.new("sql literal")), + Arel::Nodes::Not.new(random_object) + ]) + + assert_equal expected, original.invert + end + + test "except removes binary predicates referencing a given column" do + where_clause = WhereClause.new([ + table["id"].in([1, 2, 3]), + table["name"].eq(bind_param("Sean")), + table["age"].gteq(bind_param(30)), + ]) + expected = WhereClause.new([table["age"].gteq(bind_param(30))]) + + assert_equal expected, where_clause.except("id", "name") + end + + test "except jumps over unhandled binds (like with OR) correctly" do + wcs = (0..9).map do |i| + WhereClause.new([table["id#{i}"].eq(bind_param(i))]) + end + + wc = wcs[0] + wcs[1] + wcs[2].or(wcs[3]) + wcs[4] + wcs[5] + wcs[6].or(wcs[7]) + wcs[8] + wcs[9] + + expected = wcs[0] + wcs[2].or(wcs[3]) + wcs[5] + wcs[6].or(wcs[7]) + wcs[9] + actual = wc.except("id1", "id2", "id4", "id7", "id8") + + assert_equal expected, actual + end + + test "ast groups its predicates with AND" do + predicates = [ + table["id"].in([1, 2, 3]), + table["name"].eq(bind_param(nil)), + ] + where_clause = WhereClause.new(predicates) + expected = Arel::Nodes::And.new(predicates) + + assert_equal expected, where_clause.ast + end + + test "ast wraps any SQL literals in parenthesis" do + random_object = Object.new + where_clause = WhereClause.new([ + table["id"].in([1, 2, 3]), + "foo = bar", + random_object, + ]) + expected = Arel::Nodes::And.new([ + table["id"].in([1, 2, 3]), + Arel::Nodes::Grouping.new(Arel.sql("foo = bar")), + random_object, + ]) + + assert_equal expected, where_clause.ast + end + + test "ast removes any empty strings" do + where_clause = WhereClause.new([table["id"].in([1, 2, 3])]) + where_clause_with_empty = WhereClause.new([table["id"].in([1, 2, 3]), ""]) + + assert_equal where_clause.ast, where_clause_with_empty.ast + end + + test "or joins the two clauses using OR" do + where_clause = WhereClause.new([table["id"].eq(bind_param(1))]) + other_clause = WhereClause.new([table["name"].eq(bind_param("Sean"))]) + expected_ast = + Arel::Nodes::Grouping.new( + Arel::Nodes::Or.new(table["id"].eq(bind_param(1)), table["name"].eq(bind_param("Sean"))) + ) + + assert_equal expected_ast.to_sql, where_clause.or(other_clause).ast.to_sql + end + + test "or returns an empty where clause when either side is empty" do + where_clause = WhereClause.new([table["id"].eq(bind_param(1))]) + + assert_equal WhereClause.empty, where_clause.or(WhereClause.empty) + assert_equal WhereClause.empty, WhereClause.empty.or(where_clause) + end + + test "or places common conditions before the OR" do + a = WhereClause.new( + [table["id"].eq(bind_param(1)), table["name"].eq(bind_param("Sean"))], + ) + b = WhereClause.new( + [table["id"].eq(bind_param(1)), table["hair_color"].eq(bind_param("black"))], + ) + + common = WhereClause.new( + [table["id"].eq(bind_param(1))], + ) + + or_clause = WhereClause.new([table["name"].eq(bind_param("Sean"))]) + .or(WhereClause.new([table["hair_color"].eq(bind_param("black"))])) + + assert_equal common + or_clause, a.or(b) + end + + test "or can detect identical or as being a common condition" do + common_or = WhereClause.new([table["name"].eq(bind_param("Sean"))]) + .or(WhereClause.new([table["hair_color"].eq(bind_param("black"))])) + + a = common_or + WhereClause.new([table["id"].eq(bind_param(1))]) + b = common_or + WhereClause.new([table["foo"].eq(bind_param("bar"))]) + + new_or = WhereClause.new([table["id"].eq(bind_param(1))]) + .or(WhereClause.new([table["foo"].eq(bind_param("bar"))])) + + assert_equal common_or + new_or, a.or(b) + end + + test "or will use only common conditions if one side only has common conditions" do + only_common = WhereClause.new([ + table["id"].eq(bind_param(1)), + "foo = bar", + ]) + + common_with_extra = WhereClause.new([ + table["id"].eq(bind_param(1)), + "foo = bar", + table["extra"].eq(bind_param("pluto")), + ]) + + assert_equal only_common, only_common.or(common_with_extra) + assert_equal only_common, common_with_extra.or(only_common) + end + + private + + def table + Arel::Table.new("table") + end + + def bind_param(value) + Arel::Nodes::BindParam.new(value) + end + end +end |