context_start_file("pGAMMA function")
test_that("checking class",{
  expect_type(pGAMMA(0.2,1,0.1),"double")
})
Temp<-pGAMMA(0.5,0.1,1)
test_that("checking length of output",{
  expect_type(Temp,"double")
})
test_that("NA values are avoided",{
  expect_error(pGAMMA(NA,0.1,3),
              "NA or Infinite or NAN values in the Input")
})
test_that("Greater than 1",{
  expect_error(pGAMMA(3,0.1,3),
              "Invalid values in the input")
})
test_that("shape parameter b",{
  expect_error(pGAMMA(0.1,5,-4),
              "Shape parameters cannot be less than or equal to zero")
})
test_that("shape parameter a",{
  expect_error(pGAMMA(0.1,-5,4),
              "Shape parameters cannot be less than or equal to zero")
})