Hi Ben,

I ahve tested outdata population dataframe and outdata observation dataframe and both has passed the test.
Thanks,
Jeetener

tests/testthat/test-independent-testing_extend_exp_dur.R

@@ -0,0 +1,56 @@
+# Load  metadata example for exposure
+meta <- meta_sl_exposure_example()
+
+# Prepare the exposure duration data
+outdata <- prepare_exp_duration(meta,
+                                analysis = "exp_dur",
+                                population = "apat",
+                                parameter = "expdur")
+
+
+outdata_prod_pop <- outdata$meta$data_population
+outdata_prod_obs <- outdata$meta$data_observation
+
+
+#Test1
+#### Test for Extended Exposure Duration_population ######
+test_that("Extended exposure duration population data is as expected", {
+  # Extend the exposure duration
+  extended_data <- outdata |>
+    extend_exp_duration(
+      duration_category_list = list(c(1, NA), c(7, NA), c(28, NA), c(12 * 7, NA), c(24 * 7, NA)),
+      duration_category_labels = c(">=1 day", ">=7 days", ">=28 days", ">=12 weeks", ">=24 weeks")
+    )
+
+  # Define expected output data for comparison
+  expected_extended_data_pop <- extended_data$meta$data_population  
+
+    # Use expect_equal to compare the two dataframes
+    testthat::expect_equal(
+      outdata_prod_pop, 
+      expected_extended_data_pop
+
+    )
+})
+
+#Test2
+
+#### Test for Extended Exposure Duration_observation ######
+test_that("Extended exposure duration observation data is as expected", {
+  # Extend the exposure duration
+  extended_data <- outdata |>
+    extend_exp_duration(
+      duration_category_list = list(c(1, NA), c(7, NA), c(28, NA), c(12 * 7, NA), c(24 * 7, NA)),
+      duration_category_labels = c(">=1 day", ">=7 days", ">=28 days", ">=12 weeks", ">=24 weeks")
+    )
+
+  # Define  expected output data for comparison
+  expected_extended_data_obs <- extended_data$meta$data_observation  
+
+  # Use expect_equal to compare the two dataframes
+  testthat::expect_equal(
+    outdata_prod_obs, 
+    expected_extended_data_obs
+
+  )
+})