[case testTemplateStringSimple]
x = 'mypy'
t'Hello {x}'
[out]
MypyFile:1(
  AssignmentStmt:1(
    NameExpr(x)
    StrExpr(mypy))
  ExpressionStmt:2(
    TemplateStrExpr:2(
      StrExpr(Hello )
      Interpolation(
        Value(
          NameExpr(x))
        Source('x')
        Conversion(None)
        FormatSpec(None)))))

[case testTemplateStringWithComplexExpression]
x = 1
y = 2
t'Hello {x + y}'
[out]
MypyFile:1(
  AssignmentStmt:1(
    NameExpr(x)
    IntExpr(1))
  AssignmentStmt:2(
    NameExpr(y)
    IntExpr(2))
  ExpressionStmt:3(
    TemplateStrExpr:3(
      StrExpr(Hello )
      Interpolation(
        Value(
          OpExpr:3(
            +
            NameExpr(x)
            NameExpr(y)))
        Source('x + y')
        Conversion(None)
        FormatSpec(None)))))

[case testTemplateStringWithConversion]
x = 'mypy'
T'Hello {x!r}'
[out]
MypyFile:1(
  AssignmentStmt:1(
    NameExpr(x)
    StrExpr(mypy))
  ExpressionStmt:2(
    TemplateStrExpr:2(
      StrExpr(Hello )
      Interpolation(
        Value(
          NameExpr(x))
        Source('x')
        Conversion('r')
        FormatSpec(None)))))

[case testTemplateStringWithOnlyFormatSpecifier]
x = 'mypy'
t'Hello {x:<30}'
[out]
MypyFile:1(
  AssignmentStmt:1(
    NameExpr(x)
    StrExpr(mypy))
  ExpressionStmt:2(
    TemplateStrExpr:2(
      StrExpr(Hello )
      Interpolation(
        Value(
          NameExpr(x))
        Source('x')
        Conversion(None)
        FormatSpec(
          StrExpr(<30))))))

[case testTemplateStringWithFormatSpecifierAndConversion]
x = 'mypy'
t'Hello {x!s:<30}'
[out]
MypyFile:1(
  AssignmentStmt:1(
    NameExpr(x)
    StrExpr(mypy))
  ExpressionStmt:2(
    TemplateStrExpr:2(
      StrExpr(Hello )
      Interpolation(
        Value(
          NameExpr(x))
        Source('x')
        Conversion('s')
        FormatSpec(
          StrExpr(<30))))))

[case testTemplateStringWithFormatSpecifierExpression]
x = 'mypy'
y = 30
t'Hello {x!s:<{y+y}}'
[out]
MypyFile:1(
  AssignmentStmt:1(
    NameExpr(x)
    StrExpr(mypy))
  AssignmentStmt:2(
    NameExpr(y)
    IntExpr(30))
  ExpressionStmt:3(
    TemplateStrExpr:3(
      StrExpr(Hello )
      Interpolation(
        Value(
          NameExpr(x))
        Source('x')
        Conversion('s')
        FormatSpec(
          CallExpr:3(
            MemberExpr:3(
              StrExpr()
              join)
            Args(
              ListExpr:3(
                StrExpr(<)
                CallExpr:3(
                  MemberExpr:3(
                    StrExpr({:{}})
                    format)
                  Args(
                    OpExpr:3(
                      +
                      NameExpr(y)
                      NameExpr(y))
                    StrExpr()))))))))))