diff --git a/tests/testthat.R b/tests/testthat.R
new file mode 100644
index 0000000..b79375a
--- /dev/null
+++ b/tests/testthat.R
@@ -0,0 +1,12 @@
+# This file is part of the standard setup for testthat.
+# It is recommended that you do not modify it.
+#
+# Where should you do additional test configuration?
+# Learn more about the roles of various files in:
+# * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
+# * https://testthat.r-lib.org/articles/special-files.html
+
+library(testthat)
+library(pacta.json.export)
+
+test_check("pacta.json.export")
diff --git a/tests/testthat/test-get_scenario.R b/tests/testthat/test-get_scenario.R
new file mode 100644
index 0000000..ddd5381
--- /dev/null
+++ b/tests/testthat/test-get_scenario.R
@@ -0,0 +1,73 @@
+test_that("get_scenario splits on underscore", {
+  scenario_string <- "SOURCE_SCENARIO"
+  results <- get_scenario(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "SCENARIO"
+  )
+})
+
+test_that("get_scenario respects case of original string", {
+  scenario_string <- "source_scenario"
+  results <- get_scenario(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "scenario"
+  )
+})
+
+test_that("get_scenario respects mixed case of original string", {
+  scenario_string <- "sOuRcE_ScEnArIo"
+  results <- get_scenario(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "ScEnArIo"
+  )
+})
+
+test_that("get_scenario extracts scneario name from string with 1 underscore", {
+  scenario_string <- "GECO2022_1.5C"
+  results <- get_scenario(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "1.5C"
+  )
+})
+
+test_that("get_scenario extracts scneario name from string with 2 underscores", {
+  scenario_string <- "WEO2022_NZE_2050"
+  results <- get_scenario(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "NZE_2050"
+  )
+})
+
+# test_that("get_scenario throws error if no scenario_name (nothing after underscore)", {
+#   scenario_string <- "SOURCE_"
+#   expect_error(
+#     get_scenario(scenario_string),
+#     regexp = "No scenario found in string"
+#   )
+# })
+#
+# test_that("get_scenario throws error if no source (nothing before underscore)", {
+#   scenario_string <- "_SCENARIO"
+#   expect_error(
+#     get_scenario(scenario_string),
+#     regexp = "No source found in string"
+#   )
+# })
+#
+# test_that("get_scenario throws warning if multiple consecutive underscores", {
+#   scenario_string <- "SOURCE__SCENARIO"
+#   expect_warning(
+#     {results <- get_scenario(scenario_string)},
+#     regexp = "Multiple consecutive underscores in scenario string."
+#   )
+#   expect_identical(
+#     object = results,
+#     expected = "_SCENARIO"
+#   )
+# })
+#
diff --git a/tests/testthat/test-get_scenario_source.R b/tests/testthat/test-get_scenario_source.R
new file mode 100644
index 0000000..904ef63
--- /dev/null
+++ b/tests/testthat/test-get_scenario_source.R
@@ -0,0 +1,72 @@
+test_that("get_scenario_source splits on underscore", {
+  scenario_string <- "SOURCE_SCENARIO"
+  results <- get_scenario_source(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "SOURCE"
+  )
+})
+
+test_that("get_scenario_source respects case of original string", {
+  scenario_string <- "source_scenario"
+  results <- get_scenario_source(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "source"
+  )
+})
+
+test_that("get_scenario_source respects mixed case of original string", {
+  scenario_string <- "sOuRcE_ScEnArIo"
+  results <- get_scenario_source(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "sOuRcE"
+  )
+})
+
+test_that("get_scenario_source extracts source name from string with 1 underscore", {
+  scenario_string <- "GECO2022_1.5C"
+  results <- get_scenario_source(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "GECO2022"
+  )
+})
+
+test_that("get_scenario_source extracts source name from string with 2 underscores", {
+  scenario_string <- "WEO2022_NZE_2050"
+  results <- get_scenario_source(scenario_string)
+  expect_identical(
+    object = results,
+    expected = "WEO2022"
+  )
+})
+
+# test_that("get_scenario_source throws error if no source (nothing before underscore)", {
+#   scenario_string <- "_SCENARIO"
+#   expect_error(
+#     get_scenario_source(scenario_string),
+#     regexp = "No source found in string"
+#   )
+# })
+#
+# test_that("get_scenario_source throws error if no scenario_name (nothing after underscore)", {
+#   scenario_string <- "SOURCE_"
+#   expect_error(
+#     get_scenario_source(scenario_string),
+#     regexp = "No scenario found in string"
+#   )
+# })
+#
+# test_that("get_scenario_source throws warning if multiple consecutive underscores", {
+#   scenario_string <- "SOURCE__SCENARIO"
+#   expect_warning(
+#     {results <- get_scenario_source(scenario_string)},
+#     regexp = "Multiple consecutive underscores in scenario string."
+#   )
+#   expect_identical(
+#     object = results,
+#     expected = "SOURCE"
+#   )
+# })